---
product_id: 97092767
title: "24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable)"
brand: "wuyelin"
price: "R$284"
currency: BRL
in_stock: true
reviews_count: 9
category: "Wuyelin"
url: https://www.desertcart.com.br/products/97092767-24-volt-power-adapter-transformer-c-wire-adapter-thermostat-compatible
store_origin: BR
region: Brazil
---

# 24V Output 25ft Cable 120V Input 24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable)

**Brand:** wuyelin
**Price:** R$284
**Availability:** ✅ In Stock

## Summary

> 🔋 Power Up Your Home with Confidence!

## Quick Answers

- **What is this?** 24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable) by wuyelin
- **How much does it cost?** R$284 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/97092767-24-volt-power-adapter-transformer-c-wire-adapter-thermostat-compatible)

## Best For

- wuyelin enthusiasts

## Why This Product

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

## Key Features

- • **Long Reach:** 25ft cable allows flexible installation options, indoors or outdoors.
- • **Safety First:** FCC certified for peace of mind and reliable performance.
- • **Easy Installation:** User-friendly design for hassle-free setup, perfect for all skill levels.
- • **Reliable Performance:** Delivers consistent 24V AC current for optimal device operation.
- • **Power Your Smart Home:** Compatible with popular thermostats like Honeywell and Ecobee.

## Overview

The 24 Volt Power Adapter/Transformer is designed for seamless compatibility with popular smart thermostats and devices, converting standard 120V outlets to a reliable 24V AC current. With a generous 25ft cable, it ensures flexible installation while maintaining safety and performance standards.

## Description

24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable) - desertcart.com

Review: Old Wiring with No C wire - Needed to upgrade old thermostat . Was looking for a thermostat that would work without a c-wire and be updated. Found a few that were a smart thermostat and didn’t possibly need a c wire. So ended up needing a c wire in order for the wifi signal to be able to work. This plug transformer served the purpose. I ended up feeding the wire up from the basement through the wall into the thermostat wall plate just like the old wires there. That help keep it clean , no wires showing. I plugged it in one of the light fixture that had an outlet. After that all was good and my thermostat was fully functional. No trouble as of 2 months . Quality seems well made , enough length in the wiring to have no issues reaching an outlet.
Review: Worked for my Honeywell T9 - Wanted to upgrade my thermostat to a smart stat and have been putting it off due to not having a C wire, and being intimidated by the c wire adaptor. Finding this invention made my day and was very simple to install with instant results.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07L4DN5R2 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #36,702 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #146 in Electrical Adapters |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,907) |
| Date First Available | December 4, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.48 ounces |
| Item model number | MYT240300 |
| Manufacturer | WUYELIN |
| Part Number | 240030 |
| Product Dimensions | 1.8 x 2.3 x 2.5 inches |
| UPC | 791265645043 |
| Voltage | 24 Volts |

## Product Details

- **Brand:** WUYELIN
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 1.8"D x 2.3"W x 2.5"H
- **Specification Met:** UL

## Images

![24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable) - Image 1](https://m.media-amazon.com/images/I/61K8sEq4nlL.jpg)

## Questions & Answers

**Q: I purchased this but am still struggling to figure out how it will woth my Nest Thermostat E. There is no "RC" on this thermostat.**
A: I have a Nest E.  Since it doesn't have an RH port, I just used R.  So I have one wire connected to C and another to R (in addition to the existing R wire).  I was able to get both wires to fit in the R terminal just fine.  I'm not sure if this is officially support or correct (I'm not an electrician), but it seems to have been working fine for the last week.  No issues yet, and the thermostat  is now getting 200 mA (instead of the 20mA I was getting before without the C wire).  My thermostat is now at 3.9V.

**Q: Nest e: has an r (power) connection, no rc or rh.  so i connect one adapter wire to the c, does the other go to the r? what about the existing r wire?**
A: Wiring will be different for different devices. All this does is provide the constant power line. This is often the c and RC lines, but can be different.

**Q: My nest thermostat uses y1, g, rc, w1, and rh.  do i use c and double up the rc or rh? or something else? thanks**
A: HI
You only need to connect C and RC.
No need to connect RH
thank you

**Q: Can I power this wire through the wires from my electric outlet and run it through the wall without having the wires show on the outside?**
A: You would need to plug the transformer into the outlet, then if you can run the wires inside the wall so they are hidden that would work fine. But that isn't always that easy to do, especially if it needs to be a long wire run. I plugged mine in the mechanical room & connected it to an unused thermostat wire that ran to the thermostat in another room. My original system only used 2 wires, but was wired with a 6 wire cable.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Old Wiring with No C wire
*by A***D on January 21, 2026*

Needed to upgrade old thermostat . Was looking for a thermostat that would work without a c-wire and be updated. Found a few that were a smart thermostat and didn’t possibly need a c wire. So ended up needing a c wire in order for the wifi signal to be able to work. This plug transformer served the purpose. I ended up feeding the wire up from the basement through the wall into the thermostat wall plate just like the old wires there. That help keep it clean , no wires showing. I plugged it in one of the light fixture that had an outlet. After that all was good and my thermostat was fully functional. No trouble as of 2 months . Quality seems well made , enough length in the wiring to have no issues reaching an outlet.

### ⭐⭐⭐⭐⭐ Worked for my Honeywell T9
*by A***S on January 24, 2026*

Wanted to upgrade my thermostat to a smart stat and have been putting it off due to not having a C wire, and being intimidated by the c wire adaptor. Finding this invention made my day and was very simple to install with instant results.

### ⭐⭐⭐⭐⭐ Works perfect for application
*by M***S on February 12, 2026*

Exactly what wad needed to supply constant pwr to my wifi/ thermostat on my rv travel trl....works perfect......

## Frequently Bought Together

- 24 Volt Power Adapter/Transformer,C-Wire Adapter Thermostat，Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell(25Ft Cable)
- Amazon Smart Thermostat – Save money and energy - Works with Alexa and Ring - C-wire required

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.br/products/97092767-24-volt-power-adapter-transformer-c-wire-adapter-thermostat-compatible](https://www.desertcart.com.br/products/97092767-24-volt-power-adapter-transformer-c-wire-adapter-thermostat-compatible)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-21*