Review on Wireless Doorbell Set For Homes, Businesses, And More – SadoTech'S Battery-Operated 2-Door Ringer And Plug-In Chime Receiver With LED Flash In Sleek Black Design by Roger Alexander

I needed wireless doorbells as I prepare my manufactured home for sale. I bought 2 transmitters and 1 receiver. They arrived the next day (yay Prime!). The transmitters and receiver were already paired, so all I had to do was decide where to plug in the receiver and pick the tone and volume. Installation of the transmitters was so easy, even I couldn't screw it up! In way under an hour I have a doorbell at my front and back doors. I can hear the "Ding Dong" throughout my home. My cats no longer run for cover when someone rings the doorbell. I just installed these today, so I can't speak to how long they will last.