I. 48 Melodies for selection,
II. Plug in AC wireless door chime for nice style,
III. 4 grades Volume,
IV. 200 Meters

High Quality  wireless plug in doorbells/chimes 

Voltage:AC 110V or 220V for Receiver

Volume of bell:25-75db

Transmition Power: less than 10mW

Frequnency:433MHz/315MHz+/- 2MHz

Standby Current(bell): less than 1.0mA

Material of Bell Housing:ABS

Package:48pcs/Carton/0.10CBM 

Carton Size:52.5*52*36.5cm

N.W./G.W.:8.65/10.2kgs