The Byron BYRB322 Wire Free Port & Plug-in Chime Kit, is easy to install without any wiring needed. Simply plug in the chime within hearing distance & attach the door bell push, insert the batteries & the unit is ready for use. It has a 80-85dB rating depending on the sound. It is compatible will all Byron B ranges.
50m operating distance.
Chime is mains powered.
Push requires 1 x 23A battery (included).