---
product_id: 69747978
title: "AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315\" Long Cable"
brand: "viivria"
price: "138 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Viivria"
url: https://www.desertcart.pl/products/69747978-ac-24-volt-transformer-c-wire-adapter-compatible-with-all
store_origin: PL
region: Poland
---

# 315-inch (8m) ultra-long cable 24V AC output, steady power Compatible with all major smart thermostats & doorbells AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315" Long Cable

**Brand:** viivria
**Price:** 138 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your smart home like a pro—never lose connection, never lose control!

## Quick Answers

- **What is this?** AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315" Long Cable by viivria
- **How much does it cost?** 138 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/69747978-ac-24-volt-transformer-c-wire-adapter-compatible-with-all)

## Best For

- viivria enthusiasts

## Why This Product

- Trusted viivria brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultra-Long 8M Cable:** Freedom to place your device anywhere—no outlet too far, no limits to your smart home setup.
- • **Plug & Play Power Boost:** Effortlessly retrofit your smart thermostat or doorbell without rewiring headaches.
- • **Universal Compatibility:** Works seamlessly with Ring, Ecobee, Honeywell, Sensi, Nest (1st/2nd gen), and more.
- • **Hassle-Free Installation:** Set up in minutes with clear instructions—no electrician needed, just smart convenience.
- • **Safe & Certified Reliability:** Certified battery backup ensures continuous power without interrupting your smart devices.

## Overview

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.

## Description

Product description How to start this? FOR THERMOSTATS Shut off the circuit breaker power supply Install any wire from the 24 volt adapter to the "C" end and another wire to the "RC" end. If your system has a cooling system, you may need to use the included diode and connect the “RH” to the 'RC’ terminal. Plug the power adapter into the socket Open the circuit breaker power supply Install the panel on the thermostat FOR DOORBELLS Keep adapter unplugged Install wires from 24 volt adapter into the terminals for your doorbell unit (any wire can be connected to any terminal) Plug adapter into outlet Put doorbell face plate on housing unit Power up and verify your doorbell is receiving necessary power using the accompanying application Wild Using 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 Compatible with Ring Video Doorbell Ring Video Doorbell 2 Skybell Doorbell Honeywell Smart Wifi Thermostat Ecobee Thermostat Sensi Thermostat Google Nest Thermostat 1st/2nd AC 24 Volt Transformer 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. Continuously Charging It can be continuously charging your device without the worry of take of the doorbells or thermostats. Which is time saving and work saving. Package Included 1 x Adapter 24v transformer for thermostat 1 x 315 inch long cable (800 cm) Long Cable 315 inch long cable (800 cm) allows you to wire it anywhere you want. Specification Inner size: 5x 6.3 cm Box size: 10 x 5.5 x 8 cm Input: 120V AC 60Hz 0.2A Output: 24V AC 500mA Cable length: 800 cm ( 315 inch) Wire Type: Stranded copper wire

Review: Used With desertcart Thermostat - I upgraded to an desertcart 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.
Review: 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.

## Features

- WIDELY USE: US power cable Powers your popular smart thermostats((Nest 1st/2nd, Ecobee, Honeywell, Sensi) and doorbells(Ring Video Doorbell, Ring Video Doorbell 2 & Ring Video Doorbell Pro,Nest Skybell , etc.) and other devices that require constant AC 24 volt power for operation, enables you to charge your devices safely.
- EASY TO USE:Assemble along the wall from your outlet to the doorbell and thermostat without the existing doorbell or wiring. Easy installation and be able to set up in minutes.
- LONG CABLE:Our cable is 8M(315 inch) long and you do not worry about the distance between the socket and the Honeywell Smart Wifi Thermostat. This allows you to easily plug it into an electrical outlet inside or outside your house.
- SAFE AND CONVENIENT :Our battery backup has gotten certificate. A quick fix to the problem of "Low batter" you can charge it directly(plug adapter into outlet and power up). that means you don't need to remove your honeywell thermostat in order to charge up the battery.With an AC output of 24V/500mA, a perfect tool to meet your needs.
- WHAT YOU GET- 1. High quality accessory 2. 180 Days money-back 3 . Professional customer service. VIIVRIA has a professional team which has been specialized in designing and manufacturing transformers for years, improving technologies to meet consumers' needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Brand:** VIIVRIA
- **Current Rating:** 0.5 Amps
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 2.17"D x 3.94"W x 3.15"H

## Images

![AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315" Long Cable - Image 1](https://m.media-amazon.com/images/I/61ds7G4Ou0L.jpg)

## Questions & Answers

**Q: Would 24v damage the nest hello? it only need 18v, not 24v.**
A: I been using it for around 3 months with no issues with the Nest Hello.

**Q: Does this work with Nest Hello?**
A: Yes it does work with the nest, I'm using it with mine and a pellet stove

**Q: The “ul” label is no longer included on the unit. is the unit being shipped longer ul certified?**
A: I really wish people would just not respond if they don't know the answer...

Anyway, I just moved and dug my Ring doorbell out of a box along with this transformer. When I installed it, I included a huge 250 Ohm resister for some reason, got the recommendation online. Regardless, the Ring was not charging, so I tested the voltage from the transformer and got 25 volts consistently, not the 24 volts it claims, and not the 8-24 volts my door bell wanted. Sure, I got an extra volt for free, but I don't know what that will do to electronics without knowing what kind of regulator they are using, if any. So, since it provides more voltage than stated, it might not be approved anymore - I don't know. I bought this in late 2019.

**Q: Will this work with the vine 610 thermostat**
A: This will work with any thermostat.  It simply provides the 24V power needed assuming your tstat wire and doesn’t have the additional wires for 24v power.  Most furnaces have the 120/24V transformer, but older homes tstat wire never had enough conductors.  Newer homes should.  Regardless, yes, this transformer with work.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Used With Amazon Thermostat
*by G***G on March 27, 2026*

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.

### ⭐⭐⭐⭐⭐ Works great, simple to install.
*by S***F on March 18, 2026*

This is perfect for my Smart Thermostat that needed the extra 'C' wire for power. It made the retrofit so simple.

### ⭐⭐⭐⭐⭐ Works on a Honeywell thermostat
*by E***N on March 23, 2026*

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.

## Frequently Bought Together

- AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315" Long Cable
- Ring Video Doorbell Wired (newest model), Use Two-Way Talk, advanced motion detection, HD camera and real-time alerts to monitor your front door (wiring required)
- Ring Chime

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-04-25*