---
product_id: 121148288
title: "24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat"
brand: "umtele"
price: "1843 Ft"
currency: HUF
in_stock: false
reviews_count: 8
url: https://www.desertcart.hu/products/121148288-24v-40va-doorbell-transformer-power-supply-adapter-thermostat-transformer-compatible
store_origin: HU
region: Hungary
---

# 24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat

**Brand:** umtele
**Price:** 1843 Ft
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat by umtele
- **How much does it cost?** 1843 Ft with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/121148288-24v-40va-doorbell-transformer-power-supply-adapter-thermostat-transformer-compatible)

## Best For

- umtele enthusiasts

## Why This Product

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

## Description



## Images

![24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat - Image 1](https://m.media-amazon.com/images/I/612+SXBx+DL.jpg)
![24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat - Image 2](https://m.media-amazon.com/images/I/61hl6f7VlLL.jpg)
![24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat - Image 3](https://m.media-amazon.com/images/I/61qwHC+eGqL.jpg)
![24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat - Image 4](https://m.media-amazon.com/images/I/71DfeKHdEjL.jpg)
![24V 40VA Doorbell Transformer, Power Supply Adapter Thermostat Transformer Compatible with All Versions of Ring Doorbell and Nest, Ecobee, Honeywell Smart Thermostat - Image 5](https://m.media-amazon.com/images/I/615mvWePIaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Works great for Ring Doorbell Pro
  

*by P***Y on Reviewed in the United States on June 23, 2019*

I bought this for a new Ring Doorbell Pro since the main thing that seems to kill the doorbells is insufficient power. When I first hooked it up with nothing on the output, I was getting 27.7V at the unit, and even 27.7V at the doorbell location.  I called and talked to Ring to make sure that wasn’t too much voltage (they recommend 16-24V) and they said that the voltage should drop once the Ring Pro Kit (battery) is installed. He said to install the Pro kit first, touch the doorbell wires together and if my mechanical chimes work, then I’m totally fine.  I did that and everything was great, so I went ahead and installed the Ring Doorbell Pro. On the doorbell I’m getting a voltage reading of 4056 mV which is GOOD (green) and falls in their window of perfect voltage.  The unit is only a little bigger than my original 16V 10VA unit, so the only real downside is the need to purchase a beefier unit like this, but the price isn’t the worst.

### ⭐⭐⭐⭐⭐ 







  
  
    Works with Ring Doorbell
  

*by U***R on Reviewed in the United States on April 15, 2019*

This will give your Ring doorbell power if your current transformer is underpowered. It does not have a ground wire so if your box behind the transformer is plastic you will need to ground it another way. Worked good for me.

### ⭐⭐⭐⭐⭐ 







  
  
    Ease of use and connect
  

*by E***E on Reviewed in the United States on May 14, 2019*

I found it easy to install , wiring diagram was very easy to follow.

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**Shop now:** [https://www.desertcart.hu/products/121148288-24v-40va-doorbell-transformer-power-supply-adapter-thermostat-transformer-compatible](https://www.desertcart.hu/products/121148288-24v-40va-doorbell-transformer-power-supply-adapter-thermostat-transformer-compatible)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-21*