AC 24 Volt Transformer, C Wire Adapter, Compatible with All Versions of Ring Doorbell and Thermostat for Ecobee,Sensi and Honeywell, 315" Long Cable

Super easy install using an outlet as opposed to direct 110v wiring. No need for a junction box. My ring doorbell worked on the first try. Existing doorbell was removed and replaced with an old at&t intercom system that stopped working for years. No back to something more modern.

Exactly what I needed. I got a Nest thermostat from my power company for a pretty cheap price but I couldn't use it because I didn't have a C wire. Before using it I got a multimeter out just to confirm it was low voltage and it is indeed right around 23/24 volts. I decided to give this a try and after some trial and error, I was able to get the thermostat up and running. I have this transformer connected to the C and R (two wires twisted together) on my Nest backplate and it appears to be working perfectly. No errors on the Nest and I am lucky enough to have an outlet directly below my thermostat so I didn't have to run the cord very far. It isn't ideal having this transformer cable running down to the outlet but the benefits of having the Nest running far outweigh the aesthetic compromise IMHO.

Great product long cord nice to have

I took a star off because while the instruction may not be wrong but did not work for me. Here is how I get my Amazon Thermostat to work. Here are some facts first-1. The HVAC does have a C wire but could not power the Amazon Thermostat, it appears that my HVAC C wire has 24 volts but not enough current (amps) to power the Thermostat. Hence need to add the transformer.2. I live in Florida, so the heating and the AC are in one unit, that means the R(H) and RC are jumped together with only 1 Red wire.3. I can't say for other areas but in South Florida this way will work.4. When I followed the transformer instruction and mirror to the Amazon Thermostat, push the right button to connect one transformer wire to RH and the other wire to C and the Red wire from HVAC to R. I only get heat and not AC.5. To correct the issue and viewed at least DIY videos and learn to fix it. You need to merge the Red wire and one of the transformer power wire to a new leg that can insert into the R with the bottom right blue clip pushed up to allow the R and RC jumper to connect internally.Once that was done, everything work correctly. I have have heat and AC. The reason that I had only heat but not AC, because the R in the Amazon Thermostat is for "HEAT" and since you push the right blue clipper down, it disconnect the R and RC. There for there is no power sent to the AC unit.Since the the Amazon Thermostat cannot easily jump the connectors, then you must introduce a 3rd wire for the R connection with transformer power wire, Red from HVAC, bundle all three wire together.Hope this help you to install without a C wire or low amperage C wire. I have to say the Thermostat works great. Good luck.

Why did you pick this product vs others?:Great product, great price, great service

I purchased two of these units to power two battery powered Ring doorbell units. I had tired of recharging the batteries and wanted a more permanent source. These units arrived quickly and were easy to install using a wall outlet. I would highly recommend this product and purchase it again.

Worked great for my Google 4th Gen Thermostat! Wiring is ancient so my heating was a 2 wire setup. The Google supplied wiring harness that should solve the problem was tripping out my furnace because it was leeching power and the furnace went nuts. Hooked this up instead. Looks ghetto having a wire hanging down the wall, but it works 🤷‍♂️

Works as intended. Cheap alternative to charging the ring doorbell without having to remove it from it's wall mount every time you need to recharge the doorbell. Works perfectly in place of actual hardwiring in spots that don't have existing wiring or old doorbell hardwire.