Ring doorbell transformer replacement reddit I upgraded my transformer with the 30VA NuTone one from Amazon. The plug in transformer was replaced by both aftermarket and ring plug in transformer with the same results. Jan 1, 2023 · @user71659 Of course! I tried everything except that, that did the trick and confirmed that this is specifically the transformer for the doorbell. The doorbell require 8-24v in this mode to keep the battery charged. The power kit v2 was not installed. Hook up the mains to the Sonoff and run the switching wires to this doorbell. I had an old doorbell, didn't work, finally replaced it with a camera doorbell. I got a 16V 30VA transformer from Home Depot and it works like a champ now. I bought this on Amazon title "Thermostat and Doorbell Transformer 24V 40VA, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell (Style 2)" $21. The white wires to to the doorbell button. Just installed a ring doorbell pro 2. However, my doorbell won't turn on. You could also just cut those transformer wires and pull them out of the box if you are junking the transformer. 7V Kasa smart doorbell bought from Amazon has a 16V - 24V 0. If you need to do anything at the transformer, you should turn off the circuit since that has 120AC coming in that will give you a shock. Doorbell works flawlessly, and has no problems ringing my mechanical chime. I contacted Ring customer service and they told me that it's because the doorbell transformer isn't supplying enough power to the Ring Pro. In my new house I have no idea where the transformer is. Got the doorbell today and installed it. The switch kills the furnace, but not the doorbell, because the transformer is spliced inside of the switch housing, but before the switch. Surprisingly the wiring worked and I was able to ring my mechanical chime and everything. The doorbell still operates on the battery and the wires simply charge the battery. I need to replace my anemic doorbell transformer. Reading the user guide included, it mentioned that the transformer must be 8-24V, 40VA max. Then one day the doorbell pro was offline, the health page looks good, wifi signal was good, voltage was good (40xx mV). He unhooked everything and we hunted for the breaker to shut off transformer. I purchased a Ring doorbell Pro 2. When removing the existing doorbell, I noticed the two wires behind it were exposed and touching each other. In the basic installation of these ( except where you disconnect the Chime altogether), we are making a series circuit, and the Doorbell button is getting all its power through the Chime coil. 18 votes, 29 comments. the ring power supply is the transformer. The Ring Pro has been working wonderfully until recently and we have many neighbors and friends that have purchased Ring products based on our glowing recommendations. P. Worst case, you could install the new doorbell transformer, rewire the doorbell to get power from it, just cap off each of the 2 wires from the old transformer. Connect the button wires to the jack and your Sonoff can ring the doorbell and send a message to Home Assistant. So this is a bit of an odd one. Edit: It was that easy, I assumed that the doorbell transformer was part of the furnace, because it's wired onto a switch. Ring 1, battery died, ring 2, ring device flat out died, ring 3 wifi stopped working, and this one which wasnt its fault. The wall plug is the same as the skypanel plug, only it powers the doorbell. Separately, if your issue isn't with vibrating, but that the chime doesn't ding at all, you may find your doorbell transformer is underpowered, like mine was. 2. I've tried a variety of 24V transformers (including plug in ones rated for 8VA, 30VA, the tri-volt one on both 16V/10VA and 24V/20VA posts) and am getting tired of returning/re-buying duds. When this happens it's electrically the same as if the doorbell wasn't there at all. The transformer will then be enclosed in the box - in wall. Or if you have the monitoring plan you can call ring to replace doorbell as it is covered under the monitoring plan warranty. We have 3 Ring cameras, which makes it worthwhile from a cost perspective. Now to determine how to replace it. " The replacement kept disconnecting ever 1-2days and not reconnecting to the wifi unless I unplugged/plugged it back in. However, the new transformer is much bigger and it doesn't look like it'll install on the light fixture. Oh, check the attic then, if not by your main electrical panel. We had the Ring Pro installed by a professional electrician along with the proper transformer and wiring. My doorbell uses 16-24v, so this transformer can output 16v 10VA and 24v 20VA. My transformer is 16V 10vA. I installed a new transformer today, and I can read 19v from the transformer side and the end of the doorbell side. This is another tri-volt transformer. Aug 1, 2023 · Then have someone ring the doorbell while you observe the a/c voltage reading. Hi I accidentally bought the ring doorbell pro 2 with a power adapter. The doorbell health status says the transformer voltage is poor/14v, and the Power Output is Level 1 (good). Installation Download the user manual for Ring Hardwired Transformer Kit Important safety information. If it stops working just use the warranty to get a replacement and I'll come out to hook it back upfree of charge. Faulty transformer is absolutely the culprit. But regardless, you can definitely upgrade the transformer. eu/d/7C7uf4I Reply reply hypercrypt I have an MC602 likely installed in 2002. Once the lock nut is loose, slowly and carefully pull the transformer out of the box. upvotes · comments The other wire from the ring pro kit was connected to the transformer. I’m installing a Ring Video Pro 2 on a 100+ year old home. Should I replace it with a 16v or 24v? The two pics in the link are of my transformer and doorbell chime. Basement is finished so don't want to just screw it into a wall down there. In my basement, I found the old transformer installed with a light fixture. This circuit does not have a ground wire for me to attach to the ground wire on the transformer. I thought the adapter was an addition but it turns out that the regular hard wired version includes a transformer and also a pro power kit (small battery pack). Cheap $15-20 Your ring will have two screw on back connect the two low voltage wires and mount to bracket ( don’t forget to put bracket on first then connect wires. The black and red is probably the main power. Got a blinking white status light which means not enough power. It is slightly more powerful than a trickle charger to keep the Ring battery charged. Most definitely will work just fine 90% of the time as most doorbells use a coli to cause a plunger to hit a plate or bell Posted by u/[Deleted Account] - 1 vote and 6 comments I have gone through 4 doorbell transformers as I've tried to install my Ring doorbell camera. I understand the voltage required is 16-24 so I purchased a modern transformer to hopefully up the voltage being pushed to the device. Great questions, I have no idea about the adapter plugged into the wall, I was hoping a Vivint expert could chime in (hah, no pun intended!) This model Ring requies 10-24 VAC, 50/60 Hz, 10-40 VA. The old chime will likely not work with a 16v transformer if it was made for 10v. The good news is the byron 776 chime is a pretty close drop in replacement (plus some electrical wiring). To replace battery they have YouTube videos that show how to replace it. My current bell is powered and seems to be a Friedland 752 transformer with connected chime. I looked over to see if the "ring video doorbell pro 2" device was having the same issues but it only seems to be affecting the ring video doorbell pro model. This is the transformer I bought. I set it up through the app and everything looked great. At best, it's probably safer. I was hoping to see better performance from my Doorbell Pro, but I can't say that I've seen any difference. So I gave up finding the transformer and ring was about to replace my doorbell because I had voltage in spec but wasn’t powering on. I am hoping to have the battery in and also have it hardwired as well but I am not sure which transformer to buy for my electrician? He is going to run a brand new line to power it from our switchboard and told me that I should buy an official R Just plugging the NGL lines into the power kit will not work, as all the power kit does is bypass the chime to provide power from the transformer directly to the Ring Pro; hooking up 120V to that will cook it. They have an existing doorbell and chime that is on a 16V 10VA transformer. The ring power kit sits across the 13/14 terminals on the din mount to bleed power to the ring without tripping the relay just like it would be installed on a door chime. UPDATE: Contacted Ring support and it is rebooting due to fluctuating power. Or do you have the Ring Video Doorbell Pro 2? This one does not have a rechargeable battery. Ring never worked during install. I would check the transformer to see if it has output. Had a 16V 10VA, replacing with 16V 30VA. The doorbell always worked and we never had an issue. It read 16 volts as advertised. I'll probaly have to remove the whole junction box Solve power problems to your Ring Video Doorbell by replacing your existing transformer with the Hardwired Transformer Kit. Figure easiest route is above the light switch that is opposite of the doorbell do I can tap into AC there. Do you have two chimes for your doorbell? e. throw a voltage meter on there and take a reading. I’ve installed many new transformers for folks wanting doorbell cameras , the old ones 90% of the time are in the basement or at the elec service panel, sometimes mounted just above panel to a junction box. As of 45 minutes after getting the doorbell Went through the chime compatibility wizard and it said my existing chime and transformer should work. So they are sending me a replacement doorbell. If that doesn't give you voltage of 16 or so, go back and check at the 16V side of the transformer. I don't have a doorbell currently so no existing chime. 66K subscribers in the Ring community. Fortunately, a new transformer is pretty easy to install. Hey all, I purchased a Ring doorbell Pro 2. Only if there was first motion detection will the button press lead to a sound on the Ring Chime. FWIW, I also bought a Nutone C907 to replace an old 16V, 10VA transformer. You don't need a resistor for a battery powered ring doorbell when it's connected to power. I read that it could be due to not enough power getting to the ring doorbell, so I figured I would try replacing the transformer with a newer I have a Ring Pro 2 doorbell attached to a pre-wired electronic doorbell transformer. 99 and worked great. But then I read more online, and I see people also suggest the following: Ok so I ordered and got the Ring branded doorbell transformer and today removed the old one and rewired the system to the new Ring transformer. The part that is confusing me is the max VA. The transformer is supplying a small amount of power to the unit to keep the battery charged but that is the only difference with a dumb doorbell button and the wired Ring doorbell. 99. I want to install a smart doorbell / camera (Logitech Circleview), but the current voltage is not enough (needs between 16-23 volts). Previous owner had wireless doorbell. Am I still able to use 16V boxes with the transformer? I havent been able to find one that takes 24v unless you guys have. Ring Chime does connect to your wi-fi and is added on as another device in the Ring app. If you don’t feel comfortable replacing it definitely hire an electrician. How do I go about installing this new transformer? It’s a 16V 10VAC transformer and, from what I read, Simplisafe requires a 8-24VAC transformer. The TE-2D has three yellow wires coming from it with a plug at the end. Ring Doorbell Wired House the Ring transformer into a Wylex ESE2 DIN-rail box, which will be in the same position as the old Deta C3501 box. I used the jumper cable provided (designed to bypass the original chime) as instructed but the transformer isn’t sending power to the new Ring doorbell therefore it has to be the transformer. The Ring Doorbell Pro transformer was registering 28v on the Ring Doorbell Pro 2 and showing as dangerous in the app. Installed power kit that came with the chime. This chime doesn’t have a “TRANS” screw, just “FRONT”, “SIDE”, “REAR”, “TERMINAL A”, and “TERMINAL B”. I live in Australia and just purchased a brand new Ring Video Doorbell 4 Battery. Pro tip: google what they look like cause they have not changed their look in decades. I located the transformer, which is attached to my electrical panel. To get rid off that warning get the ring doorbell resister and attached it to the transformer and it will take 5v off. Now this makes complete sense to me. After a long phone call to ring they sent another replacement with the power v2 adapter. I want to install video doorbell so need transformer for power. I had no idea that it has a battery. Question 1: am I right I’m assuming the 10VAC transformer isn’t enough for the doorbell? Question 2: if I use a 30VAC transformer like the one linked below, will that supply too much power and possibly fry the doorbell or cause a fire? Hey guys. Specs are: Primary input is 220 -240VAC with Secondary output 3V to 8VAC Question is will the Ring doorbell im looking to purchase work? Today is 15 Feb 2024, I did see one person kinda answer your question. I know I located the correct transformer because when I detached one wire, the doorbell no longer rang. We installed our doorbell 3 days ago, and the battery appears to be losing power even though it's hardwired. g. We charged the battery fully before installing I've tested our doorbell transformer, it gives just over 20 volts Second time in broad daylight she breaks my ring camera and takes the whole camera with her so I wasn’t even able to receive a replacement I filed a police report and gave it to ring but they decided since the camera she broke this time was the replacement there was nothing they could do Assuming your transformer is powerful enough just replace the button outside with your ring doorbell and follow set up instructions Reply reply [deleted] Old chime was on a 12V transformer, it was putting out about 13. We purchased a Ring Pro Video Doorbell on 8/3/2019. I recently added a video doorbell and found that I needed to replace the transformer in order for it to get enough power. A faulty transformer though can push unregulated high voltage to the camera to fry its internal components. I am starting to think that a recent firmware/software update for the ring video doorbell pro is probably causing this issue. Mine momentarily dropped from 20 V to 14 V when the doorbell was rung. S. My mechanical doorchimes both ring very loudly with no delay and the 2 way audio is loud and clear. Posted by u/darock888 - 2 votes and 2 comments Aug 20, 2018 · About this item 【16V 30VA Doorbell Transformer】Input: 120V, 60 HZ; Output: 16V at 30 VA; Low voltage hardwired doorbell power supply for residential, commercial and industrial use, offers reliable performance, safe to use Google Ring doorbell transformer to get the appropriate size. Once I replaced the doorbell with Ring door bell, it worked momentarily and then it would not power on. You should only need to access the wiring at the doorbell area for this. Hi all. If no voltage there check breaker panel to see if it’s off If voltage is 110 and not 24 volts on other side replace transformer. I had to replace my existing doorbell transformer that seemed to be of arguable quality and was testing at about 4 Watts of output. Had no idea if the doorbell even worked (never thought to test it) friend offered to hook up a new ring for me and I think he shorted the transformer as, during install, it got insanely hot and smelled like it was burning. I have bought an ring doorbell pro and a new transformer for ring doorbell pro (16V 30VA) on ring. Upgraded to a Ring Doorbell and need to change the transformer . Ohms law is very useful Hi guys, my doorbell transformer is attached to the left side my electrical box. The transformer does this buzzing thing every 30 seconds or so. This is completely false. Because I worked with their support countless times and it's always been the rings and they replace them and resolves the issue. EDit: Also adding that i'm going with doorbell 4 instead of pro 2 is because I feel the internal tiny battery that helps run the device in conjunction with hardwire in pro probably has the same technology in pro2 and will eventually give out and require a replacement. Ring doorbell pro transformer only installation I ordered a ring doorbell pro and this was fitted by an electrician. This sub is run by the… Going strong for months now after swapping out a 1st gen Ring doorbell. What is this thing off to the side , and do I need to do anything with it ? I’d assume it’s just plug and play since the two wires from the transformer go to it , but wanted to double check before I get myself into some shit I can’t fix 😅🫡 However at night there is not enough power for the infrared to work. 5 years ago I bought and installed a Ring Doorbell Pro (wired version that runs off the doorbell power supply and uses the original ringer). However, if you have several Ring cameras, you can basically consider it a way to pre-pay for replacement batteries. Having doorbell 4 hardwire with battery should have a better longevity. If the voltage dips momentarily, then this transformer is powering the doorbell. I have two doorbells. a real good chance that power supply is bad. VEMER VN319000 Transformer TMC 30/24 from DIN Rod for Continuous Operation 230 V/12-24 V Power 30 VA, lightgrey https://amzn. Hello all. The wiring is the same as any other doorbell and will not cause any problem with the transformer. I was Replacing my Ring doorbell because they are wanting to raise the cloud storage to $50,00 so I decided it was cheaper to get Eufy 2K doorbell instead, since I only paid about $56. If you have 120v and it's properly wired, but no 16V output replace the transformer. I have digital preexisting chime, not mechanical. Short story is I now have two wires from the transformer (within a regular piece of Cat6) that end in an RJ45 that plugs into the Ring’s former jack on the patch panel. In the past, I had issues with my Ring Pro rebooting instead of ringing the indoor chime. By the way, this is I brought the gen 2 Nest doorbell (wired) to replace the generation 1(wired). If that doesn't work, test with a non-contact sensor to make sure your 120V connection is good and that your transformer is properly wired on the AC side. My original nest doorbell I no longer receive notifications on my phone; I presume the internal battery has gone bad. My old doorbell is a mechanical one. Other than that it was a straight forward unscrew and replace. If it is working then it's the doorbell or battery. Hello and Merry Christmas everyone. It seems to be screwed in and there's just not enough room to unscrew it as the furnace intake is in the way. Have transformer, but instructions say not to install in attic. Just the basic one they carry, I think it was $14. It appears to be losing 2-3% of charge every day. I’m installing a new Ring Pro 2 doorbell and trying to connect the Pro Power v3 kit to the chime. Could I take my current single electrical box a double box, put a transformer next to the outlet and just put a plate over it. I went through over an hour of troubleshooting with Ring support and nothing they suggested brought it to life so they concluded it was dead and I'd have to buy a new one. I had to replace my existing 16v 10amp transformer with a 16v 30a one to meet the combined power needs of the smart doorbell and chime. Hello reddit, My parents got a Ring Doorbell 3 for Christmas and I was going to help them set it up. I’m installing my Ring Doorbell Wired, and when I have the jumper install it is not receiving power. A community space for discussion about all things Ring. Well, the electrician was just here and during small talk I asked if the doorbell transformer was high voltage or low voltage and their response was "It doesn't make a difference with these things. Should this be higher? Looking for a new transformer I only see 16 volt and up for Ring compatibility, and I read that could fry the old chime. If you have the simple 1st gen Ring Doorbell button, just the transformer upgrade should provide the needed power. However, when I take it off the doorbell is showing that it is receiving power l, but not enough. 00 for the camera, the storage I would have paid for, I bought a whole new camera with 4GB Storage in it. I believe that it is unlikely that the same transformer powers both the doorbell and the HVAC low voltage Dec 4, 2019 · The Ring will require a "modern" doorbell transformer, so that needs to be replaced for sure. 5A rating. I would like to replace it with a 16 volt so I have future compatibility but can still use the old chime. Wire up the Ring Doorbell Pro outside, again using the blue/white and orange/white twisted pairs. It needs at least 16V but my current transformer only supplies about 5V. Doorbell Pro and Pro 2 will need the ring transformer (pro 2 comes with it). Anyway, I installed the new doorbell last night. I have two doorbells, one at the front door and another at the back door. I replaced it with the new transformer and it's settled back to 24v. The pictured extra electronic unit here was supplied with the Ring -- I'm presuming this is because the doorbell needs constant power to run the IR camera, motion detection, etc? Anyway there's a CONSTANT clicking coming from the door chime, many times a So getting power to the doorbell is not an issue -- where to mount the transformer is. The doorbell worked for maybe an hour, then stopped. I kept getting warning from the doorbell that my power was too low though, so figured I'd replace the transformer. That’s not to say not to be careful since shorting the wires at the doorbell area will create a harmless spark (unless you are near fuel). Im thinking of purchasing the wired version of Ring Doorbell. Can I replace a 16v 10va doorbell transformer with a 16v 30va transformer? I installed a Ring doorbell and the transformer went out. I got on a call with support, and they went back and forth, finally deciding that the voltage was dropping during the actual mechanical doorbell ring event. Easy enough, remove old transformer, replace wiring in exact same way on new transformer, right? Well, sort of. Also have to check transformer to see if it is working properly as they will not a replace a second time if it is not a proper voltage one. Hey all, just installed a ring pro using a honeywell AT140a transformer that pumps 24v 40va - everything works well, except I'd like to replace my defective mechanical doorbell box. I tested this several times and it's kind of weird but not deal breaker. So I removed the ring pro kit and connected the doorbell directly to the transformer. com. Reply reply I moved into an old house with an existing 10V doorbell and chime. When I press the new ring doorbell, the mechanical chime only "dings" when it used to "ding" and "dong". Thinking a transformer to 24v that plugs into the 120v outlet. As you get ready to install your hardwired transformer, it’s important to keep the following safety precautions in mind: Second time in broad daylight she breaks my ring camera and takes the whole camera with her so I wasn’t even able to receive a replacement I filed a police report and gave it to ring but they decided since the camera she broke this time was the replacement there was nothing they could do Hi all, trying to replace a doorbell transformer from a 16V 10VA transformer to a video doorbell compatible 16V 30VA transformer. I attempted to replace my doorbell with the ring wired doorbell. It took me a day or two to find mine. Must be terrible wiring or a really low rated transformer if it can't keep a Doorbell 2 charged. The doorbell immediately allowed me to reboot and I got the white circle immediately and now the doorbell is back up and running normally, at least for now. So you connect one to the transformer then the other to the ring pro. I am replacing my doorbell transformer in order to install a new doorbell. For incoming traffic there should always been motion before someone rings the doorbell. Now or when you get a replacement it is worth a try swapping either the transformer or taking the mechanics chime out of the equation. Is existing wiring to the doorbell chime something to be concerned about? Fear of fire, assuming higher VA means higher electrical throughput. , I have one in the front hall, somewhat close to the actual doorbell (but I don't have a chime upstairs). Feed the wires through the same hole. Doorbell Pro wired up and works fine, but seems to kill the transformers after anywhere from 1 to 5 days. Got a 24V 40VA transformer arriving tomorrow. It's never been the transformer till now as the power levels were fine before this. Its crazy because the transformer is not outputting that voltage my multimeter is 10v lower, but often we don’t get true 120v often higher i am replacing with a lower voltage to be safe. Can anyone explain exactly what voltage this transformer is supposed to put out and what my options are for replacement? I bought a ring doorbell pro 2 and installed it with this existing (old) transformer in the wiring. You can turn the transformer from the outside to help loosen the lock nut. My current transformer is tucked away behind a blank plate in a single gang box. The voltage reading I got at the button was 11 and when I installed the device it would turn on but had trouble staying connected. There are TE-2D and TE-5B transformers. The battery can be had just about anywhere. The Doorbell and Doorbell 2 are the most forgiving, typically being able to maintain a charge with even as little as 8VAC @ 10VA. I hate how Ring is using their subscription model to pay for inevitable product replacements rather than making better quality hardware that can be fixed. After doing some research I purchased this model from amazon. A faulty ring camera will not destroy a transformer. I was able to receive notifications and view live video. Ring was under no obligation to replace your unit due to a faulty transformer, it was very nice of them to accommodate you. Replace the new transformer. I got a transformer from Home Depot. I used the installment service from Amazon. There is no reason (except maybe your sanity) to shut off the power when swapping out the doorbell with the Ring. My current transformer has 10V. It appears to be an old 9v doorbell transformer for a buzzer-type doorbell. A ring doorbell can only run on 16-24v ac and your home is 110v ac. You’ll need to replace (and it probably wouldn’t hurt to re-wire) with a modern 16v/30a transformer for doorbell pro power. I’ve searched all around, and I can’t find the transformer to replace it. The ring pro has two terminals , one is connected to the relay and one to the transformer. I read that the ring pro kit is only used to bypass an old doorbell, and that the doorbell should be connected directly to the transformer. If the doorbell type is set as 'mechanical' in the Google Home app, when you press the doorbell, the device basically just shorts the two wires to ring the chime. I will be installing the Ring Doorbell Pro 2. I have to replace my doorbell transformer because it is a 10V transformer and I need it to be 16-24V. I've learned a lot of lessons but these transformers keep breaking. A week ago, it just went dead. This circuit does not have a ground wire for me to attach the ground on the transformer to. Use a meter on the doorbell wires, set it to voltage, and start turning off circuits. I have tested this latest one with a multi meter by putting the wires in the outlet and reading the volts. As I mentioned above, a 16VAC/30VA transformer is what is recommended. Load a Sonoff TH10/16 with Tasmota. Would either of the terminal screws be a proper replacement for the TRANS screw? After going back and forth with tech support with a malfunctioning Pro doorbell that was working fine for several months, I received my replacement doorbell yesterday. The replacement isn't going to fit and I'd like to avoid having to rip out the single gang box and replace it with a larger one. I bought a 16V/30VA rated doorbell transformer to replace the old (perfectly working) transformer Installed new transformer - matched wire colors (black-black, white-white and green-bare copper). I removed the old doorbell and installed the replacement one. As others have said, the doorbell is low voltage, so you don't need to turn off the power to the transformer to install a new doorbell. I didn’t have an existing doorbell or chime so he installed the 24v transformer supplied by ring and connected the doorbell directly to this. Transformer is usually on a power line near the doorbell: they can be found inside attics on studs or even in closets near the entry. Now I worked with inside wiring especially low voltage twisted pair for about 12 years so I am not an idiot. I bought a 24v doorbell transformer from Amazon that plugs into a regular output and provides screw terminals. It might work for a little bit, but it will sound funny and will probably fail quickly with the extra voltage. Mine was connected to a round junction box, and since the new transformer is bigger, it wasn't just a simple swap. New home with no doorbell or transformer, and looking for advice on what I need to install a doorbell camera. It worked well around 3 months. Trying to power my Ring Video Doorbell 2 as well. I installed it and never got the 16v reading I don't think this can be a transformer issue. What could be the issue? If it helps, the plug that goes to the doorbell in my attic has 12v output. A non contact voltage tester might even pick up the low voltage but a meter would definitely work, and let you know if you already have the correct voltage. Its a maybe - the recomended minimum for doorbell wired or one of the battery doorbells to charge is 8v 1amp, its possible they will work, and possible they won’t. jrsue ygil tntb hkgtf ymjw ysj eizt grtarg fpqlpgm zvml