Can you use a plug in transformer with the Ring Doorbell 2? Yes. What plug in transformer should you use that will be compatible with the Ring Doorbell 2? We teach you how to install a new transformer for your Ring Doorbell 2if you don’t have any existing wiring and what plug in transformers will work with the Ring Doorbell 2. We also provide a guide of everything you need to install a Ring Doorbell 2 if you are replacing an old battery powered doorbell or need to connect your doorbell to new power source. The Ring Doorbell 2 can operate on batteries or hardwired power. If you wire your Ring Doorbell 2 with a constant power supply from a plug in transformer it will operate better, with better video quality, less delay and a better wifi connection. It’s important to select the right plug in doorbell transformer for your Ring Doorbell 2 for proper functionality of the Ring Doorbell 2.