I.48 Melodies for your selection,
II.Plug in wireless doorbell,
III.4 grades Volume,
IV.with LED light,
V.200 Meter

Hi-Tech Digital Musical Doorbell for Apartments 

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/0.087CBM 

Carton Size:51*46*37cm

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