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Availability:
Only 10 left in stock, order soon!
Arrives
Oct 29 – Oct 30
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At a glance
- Condition
- New
- Dimensions
- 2.17"D x 3.94"W x 3.15"H
- Power Source
- Corded Electric
- Mounting Type
- Wall Mount
- Current Rating
- 0.5 A
- In the box
- AC 24 Volt Transformer with 315" Long Cable
Features 6
- WIDE COMPATIBILITY: US power cable powers popular smart thermostats including Nest 1st/2nd, Ecobee, Honeywell, and Sensi, as well as doorbells including Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest, and Skybell, along with other devices that require constant AC 24 volt power for operation, enabling safe charging of your devices
- EASY INSTALLATION: Assemble along the wall from your outlet to the doorbell and thermostat without the existing doorbell or wiring, with simple setup that can be completed in minutes
- EXTENDED CABLE LENGTH: Cable measures 8 meters (315 inches) long, eliminating concerns about the distance between the socket and your smart thermostat, allowing you to easily plug it into an electrical outlet inside or outside your house
- SAFE AND CONVENIENT OPERATION: Certified battery backup provides a quick solution to low battery issues with direct charging capability by plugging adapter into outlet and powering up, eliminating the need to remove your thermostat to charge the battery, with an AC output of 24V/500mA to meet your power needs
- QUALITY CONSTRUCTION: High quality accessory manufactured by VIIVRIA, a professional team specialized in designing and manufacturing transformers for years, with continuous technology improvements to meet consumer needs and professional customer service support
- COMPACT DESIGN: Wall-mountable transformer with compact dimensions measuring 5.5cm depth by 10cm width by 8cm height, providing flexible placement options while maintaining a small footprint in your installation space
Description
How to start this? FOR THERMOSTATS FOR DOORBELLS This is a device that you can keep your machine continuously charging your doorbells or thermostats. Many old homes or apartments do not have a "C" wire to their current thermostat, and newer devices require a C-wire to power the device.This simple product allows you to make the problems Competible with All Versions of Ring Doorbell and Thermostat for Ecobee, Sensi and Honeywell Note: Competible with Google Nest Thermostat 1st/2nd，Not for 3rd. It can be continuously charging your device without the worry of take of the doorbells or thermostats. Which is time saving and work saving. 1 x Adapter 24v transformer for thermostat 1 x 315 inch long cable (800 cm) 315 inch long cable (800 cm) allows you to wire it anywhere you want.
Specs 13
| Brand | VIIVRIA |
|---|---|
| Power Source | Corded Electric |
| Product Dimensions | 2.17"D x 3.94"W x 3.15"H |
| Mounting Type | Wall Mount |
| Current Rating | 0.5 A |
| Brand Name | VIIVRIA |
| Model | 1 |
| Number of Items | 1 |
| Item Highlight | Compatible with All Ring Doorbell Versions & Ecobee/Sensi/Honeywell Thermostats; Continuous Power; 26ft Reach; Easy Setup |
| Manufacturer | 1 |
| Unit Count | 1 Count |
| Part Number | 1 |
| Item Dimensions D x W x H | 2.17"D x 3.94"W x 3.15"H |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Oct 29 – Oct 30
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Easy install and works.
Easy install on a Sensi 2 thermometer. If you have a thermostat, usually older style, that uses battery and want to upgrade to a smart thermometer but dont have power coming to your thermostat like i did this will give you the power you need. My steam boiler only has two wires coming from the basement to the front of the house living room. Running a new cable would entail opening up walls or ceilings so i did some research and whoever doenst have an extra wire running up, this is the easiest solution. Some houses when they were wired, they ran three wires and only two were used you can use the spare one to power your smart thermostat or you can use the fan wire too, i did not have either. I chose a nearby outlet and decided to run the wire through the wall to make it look neat. Installed a ln outlet next to a light switch and looks good in my opinion. Power adapter plugs in and you just wire the ends to your RC and C terminals thats it youre done, polarity doesnt matter. Made a wooden frame for the thermostat using original wood and lath that was used to construct the house, Looks cheesy but i like it.
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Reviewed in the United States on October 21, 2025 by Geo Geo
GREAT "C" WIRE FIX
NEEDED A "C" WIRE FOR MY WIFI THERMOSTAT. THIS WAS RECOMMENDED TO SOLVE THE PROBLEM. IT WORKS GREAT. PRICE WAS GOOD AND IT COMES WITH 26 FEET OF WIRE. I DO RECOMMEND THIS PRODUCT.
Reviewed in the United States on December 9, 2025 by EDDIE
Essential Power Solution for My Ecobee Doorbell—Quick and Reliable!
I purchased the Vivria power adapter to go with my new Ecobee Smart Doorbell Camera, and I’m so glad I did! We were about to leave for a vacation and needed a quick, dependable solution to power the camera, so we could monitor our home remotely. This adapter was exactly what I needed. Fast & Easy Installation: The setup couldn’t have been simpler—just plug it in, and it’s ready to go. I was on a tight schedule before heading out of town, and the straightforward installation was a lifesaver. I was also able to angle the wiring through the wall for a clean, discreet look without any hassle. Excuse my first missed drill attempt in the photos, but as you can see this install was pretty simple with the adapter once I found the angle. Reliable Power for Peace of Mind: This adapter provided stable, uninterrupted power to the doorbell camera, ensuring that we could keep an eye on our home while we were away. It was such a relief knowing I didn’t have to worry about the power source, which gave me full peace of mind during the trip. Final Thoughts: If you need a quick, reliable power solution for your smart doorbell or similar devices, especially if you’re on a time crunch, this adapter is perfect. Dependable, easy to install, and does exactly what it promises—highly recommended!
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Reviewed in the United States on October 28, 2024 by Billy Lindsey Billy Lindsey
These are great, but you never know when they’ll quit.
Works great and all that, blah blah blah, but what makes them quit working after one or two years? This is a replacement for one I bought a couple years ago that just up and quit working. I opened the broken one up and there’s really nothing inside them except two steel plates and a bunch of really thin copper wire all wound up inside. No moving parts, no motherboard, no nothing, just steel and copper, what could make them just quit working?
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Reviewed in the United States on October 10, 2025 by Hal
works well
wire is very long. But everything worked properly out of the box.
Reviewed in the United States on October 29, 2025 by Normand Bourque
Worked with Ring doorbell
Worked with the new Ring doorbell. Now I don’t have to change the battery every month. Fairly easy install. Saved a hundreds with not needing an electrician to come install something fancy. Happy with this purchase.
Reviewed in the United States on November 17, 2025 by Z33C0
Works very well as intended
Works perfectly for Google Nest doorbell and the Google Nest Thermostat that requires the "C" wire. I have a boiler that only has 2 wires that was hooked up to a mercury switch thermostat, however the Nest thermostat Requires a "C" wire that provides very low energy source. If you don't have one then this works very well, just attach the wires to Red with the Red wire coming from the boiler and the other to the "C" wire on the Nest Thermostat. Your all set. Doorbell is easier just attach the two wires to the doorbell (it doesn't matter which wire screws into the doorbell as far as left or right just screw them in) and plug it into a wall.
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Reviewed in the United States on December 13, 2025 by marcus ransom marcus ransom
Good adapter but not for high demanding devices
TLDR: If you need a 24v adapter, your device does not need more than 0.5A and/or your camera is in a very low traffic area this should work perfectly. In my case it does not provide enough current to charge to keep my Eufy E340 camera going 24/7/365. In depth: To be clear this review reflects more of my unique use case than the adapter's quality. The unit works as its intended and that it says it would, supplying 24v and 0.5A but in my use case it does not provide enough amperage for the Eufy E340 video doorbell camera. Due my camera being in a very high traffic area, with all the sensitivity settings turn down to the lowest, activity and privacy zones setup to try and minimize alerts/recordings this adapter cannot supply enough current to charge and keep the internal battery of the E340 topped up. The battery will begin to drain down until the camera has to turn off and disconnect, at this time the adapter will be able to be-able to charge the battery. You will lose a few hours of coverage from this issue, where the E340 cannot process recordings, chimes and etc. I would typically return the unit but as I had already run, clamped and hid the wiring, I will be purchasing a different adapter, cutting the wires off this unit and connecting them to the new different adapter to save time and energy resolving my use case issue. In terms of the unit itself, it seems to be good quality; not to big as to block other outlets which countless other adapters will do. The wire length is great at 8m or 26.2ft or 315in, is 26awg stranded wire that is terminated with pre stripped and tinned ends, which even the flux used from their tinning process being cleaned off shows an attention to detail and QA/QC. Price is what you would expect for these types of adapters ($17 USD at time of writing) so it's a good value for money. No coil whine or noise can be heard and it does not generate abnormal levels of heat (granted only used the "touch method" instead of actually measure with say a infrared thermometer).
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Reviewed in the United States on March 23, 2025 by N.Tesla