Stylish Wireless Doorbell with 36-Melody - White (AC 220V)

1.36 high quality melodies for you choose
2.Adjustable Volume (4 levels), 25-85dB
3.Long remote control distance to 280 meters (in the open air)
4.No error when signal transmit, no disturb your neighbors
5.Waterproof transmitter button

Specification
Material: Plastic
Work Voltage: AC 110V/220V 50Hz/60Hz (range AC 100-240V available)
Work Frequency: 315MHz / 433MHz
Transmitter Size: 30x90x90 mm
Receiver Size: 30x60x95mm
Transmitter Power :< 10mW
Receiver Standby: <1mA