The ultimate in low-maintenance convenience: with the Honeywell Home Series 3 Doorbell, plugging it in is nearly the only thing you need to do. No tools, no wires, no batteries, and no fuss. This simple "fit and forget" doorbell packs impressive range, a choice of tunes, and a strobe, giving you everything you need in a doorbell, plus a little bit more. High quality sound can provide a volume as high as 84 dB, and robust signal has a 250-ft range so you can install it anywhere in your home where a plug is available. Connect up to 4 transmitters simultaneously, such as push buttons and awareness devices (door contacts, motion sensors).