Features:
1. 500 feet maximum range of operation in open area
2.Adjustable volume with 4 levels
3.36 different tunes for your choice.
4.High quality ABS material with LED light.
5.Long distance transmission and high strength signal and sensitivity.
6.Wireless designed for easy install and operates.
7.Effectively reminds you of the coming of guests or friends
8.Plug type :EU

Transmitter:Size:7*4.5*1.7cm
Working Voltage: 12V (battery type: 23A 12V included)
Operating current: 12mA
Weight: 22g 

Receiver:Size:10*5*4.8cm
Tones Kinds: 36
Voltage: AC 90--260V
Operating Current: 60mA
Quiescent current: 7mA
Controlled volume: 25-80dB
Weight: 53g 

Package:
1 x Wireless Electronic Doorbell Receiver
1 x Doorbell Button
1 x Manual