Qualtex Wirefree Portable Door Chime features a choice of 8 chimes with rich acoustic sound quality at an impressive 85dB, with 80 metre operating range. The chime can be used with other Jegs wire free door chimes, perfect for ensuring the door bell never goes unnoticed no matter which room you are in. 1 bell push is supplied complete with battery, and up to 4 bell pushes can be used with one chime unit.