

⚡ Power your smart home like a pro—never lose connection, never lose control!
The VIIVRIA AC 24 Volt Transformer with a 315-inch cable is a certified, reliable power adapter designed to provide continuous 24V AC power to smart thermostats and doorbells lacking a C-wire. Compatible with top brands like Ring, Ecobee, Honeywell, Sensi, and Nest (1st/2nd gen), it enables easy, safe installation without rewiring. Its ultra-long cable offers flexible placement, making it the perfect upgrade for modern smart homes.








| ASIN | B07DJ7RHS5 |
| Best Sellers Rank | #2,756 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Door Bell Transformers |
| Brand | VIIVRIA |
| Brand Name | VIIVRIA |
| Current Rating | 0.5 Amps |
| Customer Reviews | 4.5 out of 5 stars 6,735 Reviews |
| Included Components | AC 24 Volt Transformer with 315" Long Cable |
| Item Dimensions D x W x H | 2.17"D x 3.94"W x 3.15"H |
| Manufacturer | 1 |
| Model | 1 |
| Mounting Type | Wall Mount |
| Part Number | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 2.17"D x 3.94"W x 3.15"H |
G**G
Used With Amazon Thermostat
I upgraded to an Amazon thermostat but didn't have a C wire. This worked great to power my thermostat. Since my thermostat is over the air return, I dropped power into the return and put an outlet behind the air filter (yes, I used rated cable.) A completely hidden installation. I love it when a plan comes together.
S**F
Works great, simple to install.
This is perfect for my Smart Thermostat that needed the extra 'C' wire for power. It made the retrofit so simple.
E**N
Works on a Honeywell thermostat
Worked great for supplying power when there is no C wire for a Honeywell T5 thermostat. I have installed 2 of these and getting ready to install a third one.
A**R
Great for sensi tstat C wire
Works fine with my sensi t-stat. no issues and easy to use
A**R
Easy peasy install!!
This is awesome. Watched a video on wall plugin 24v transformers andwas done in 10 mins. I didn't even cut the power off. Ecobee camera doorbell reset in about 2 minutes. I recommend!
N**.
Works great
Works great, installs easily and has sooooo much extra cord it's crazy
S**.
Great alternative power source
Super long cable (315 inches / ~26 feet / 8 meters) — This is the standout feature. You can route it from a distant outlet (garage, basement, or indoor wall) to your outdoor doorbell or upstairs thermostat without needing extensions or worrying about reach. Many shorter adapters (10-16 ft) fall short in real homes; this one gives you flexibility for clean, hidden installs along baseboards or exterior walls. Works seamlessly with all Ring Video Doorbell versions (including Pro, 2, 3/4, Plus), plus smart thermostats like Ecobee, Sensi, Honeywell, Nest (1st/2nd gen), and others needing 24V AC. Output is typically 24V/500mA, which matches or exceeds what these devices require for stable operation—no underpowering issues that cause random reboots or battery drain. If your setup lacks existing doorbell/transformer wiring or a C wire, and you want something affordable, long-reaching, and dead-reliable, grab this. It’s especially great for renters, older homes, or anyone avoiding wall modifications. Saved me from constant recharges and false alerts highly recommend for the price and convenience.
L**N
Great price
Worked perfectly for my ring camera
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منذ أسبوعين
منذ أسبوعين