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

Great value for your money, easy wiring, and installed very easily works very well very small easy to hide when installed.

I purchased a Doorbell camera, and could not get the chime to work with my existing transformer. I took a look at my transformer and it is only a 10VAC transformer. Works fine for conventional doorbell chime. I was curious if the 10 VAC was low for the camera. The camera works fine on the 10VAC transformer, but the chimes did not work. For kicks, decided to buy this transformer to see if it would make a difference. Sure enough...installed this transformer, and the chimes immediately started working with the mechanical chime adapter. The open circuit voltage on my original transformer was 16VAC, while this one is approximately 19.5 VAC (measured with a good Fluke DMM). As far as the transformer itself, it was perfect, three wires (black, white, green), mounting nut was provided. Seems well made, rivet is correctly pressed, laminated plates all look aligned, ground wire is installed between the body and the core. All good. installation took 10 minutes. An interesting observation is that they used Philips instead of slotted screws, but that's not a dealbreaker.

I have two ring pro doorbells. The excess load caused my old transformer to blow. Installed this one and so far works perfectly.

Third times a charm! I ordered two of these USED, which both arrived DOA. Not BOJACK’s fault, those previously used parts don’t go back to them (just to Amazon who does not retest). Be cautious if trying to buy used or open box. For the fee bucks more, buy new and get a tested/working model. Also, fantastic and fast customer service! Bought this upgrade my 16v to 24v for Ring Doorbell. Necessary if you have voltage drop and trying to use mechanical chime. Thanks!

Item was east to install, use electrician if you don't know how or are uneasy about electricity. 4 stars due to power coming in at 28.5v

Work great. Have been in service for 6 months + with a ring doorbell

This was the exact transformer i needed to run some power to some Doorbell Cameras i installed on my front and back doors of my building. It supplied sufficient power to both cameras without issues.

I purchased the Google doorbell and The transformer that came with the house just didn't have the juice to make everything work This transformer is a beast and everything works great. I highly recommend it

worked perfectly

Didn't work we have three doorbells in the house so I think I needed a different system

Was getting an extra 1.8v without load, maybe that's fine, maybe it's not, but it working ok with my Ubiquiti G4 Doorbell camera - unfortunately I still can't use a normal chime with it, since the doorbell has issues beyond the power delivery from the transformer, but that's irrelevant to this review.

I was having ecobee thermostat rebooting problem , this was used on a gas unit heater for a shop , I looked at existing transformer and it was only a 1200 milli amp which is 1.2 amp , not near enough for both to run properly , this replacement work great , so if you are having reboot problems look at the transformer you have it could be under size for both