"I just wanted to thank you for making this product."


Installing OhmKat is Easy!

Whether a pro or novice, OhmKat power supplies and chimes makes installing video doorbells anywhere super easy. 

Install a Power Supply                                       One Touch Power Test                                              Install a Chime      

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Item worked exactly as described. Followed included instructions and everything worked like a charm. Also, seller was quick to respond to questions and sent me an updated PDF of instructions for my old eyes.

Amazon review


I've seen a lot of posts lately about transformer or power issues. I purchased a power supply from this site and it has worked flawlessly since I installed it. I don't have any connection to this company, other than as a satisfied customer. I did check with Ring support before purchase and they endorsed them as well. Hope this helps some of you.

Posted to reddit


Awesome product. I don't know why Ring does not offer something like this.

Amazon review


Product works great and keeps my Ring doorbell up and running. Wonderful tech support available as well.

Amazon review

Kathryn Walsh

I installed this on my ring doorbell after trying three other recommended brands and it worked as promised. I have installed several ring doorbell for other customers and this is the transformer that I use when the existing transformer is not compatible.
The transformer is excellent.

Amazon comment

Amazon customer

I am not a techy by no stretch of the imagination but this product is great. Bought two. Made this purchase upon the advice of a professional technician.

Amazon review


When I had some questions regarding the installation, I contacted the manufacturer who guided me through the whole process. They even offer lifetime replacement warranty if your doorbell supply ever stops functioning. I think that is a really good offer for a product so cheap.