2 Emitters Doorbell Waterproof 280 m Long Range Wireless Doorbell, 36 Tunes

Description
1. Waterproof
2. Long remote control distance to 280 meters (in the open air)
3.Adjustable Volume (4 levels), 25-85dB
4. 36 melodies and a chord;
5. Color: white.
6.1 emitter 2 receivers
7. No error when signal transmit even 2 sets or more installed in one place and no disturb your neighbors.

Item Type : Wireless doorbell
Communication interface : Wireless
Alarm : Not
Power : Dry battery

Specification
Work Voltage: AC 110V/220V 50Hz/60Hz (range AC 100-240V available)
Work Frequency: 315MHz / 433MHz
Transmitter Size: 20x40x75 mm
Receiver Size: 30x60x95 mm
Transmitter Power :< 10mW
Receiver Standby: <1mA
Transmitter battery type: 23A 12V (1 PC, alkaline, standby lifespan: 15 months)

Contents:
1*Emitter
2*Receiver