The Byron BYRB314 Wire Free Chime Kit 50m range, is easy to install without any wiring needed, simply place on a wall in hearing distance and attach the door bell push, insert the batteries and the unit is ready for use.

4 melodies.
50m operating distance.
Self learning.
Chime requires 3 x AA batteries (NOT included).
Push requires 1 x 23A battery (included).