Self-powered 1 Receiver 1 Transmitter Wireless Smart Doorbell Home Dingdong Music Electronic Doorbell Pager

Specification: 
Carrier frequency: 433.92MHz; 
Pressing force: <5N; 
Standby power consumption: 0W; 
Service life: >200,000 times; 
 
Receiver 
Carrier frequency: 433.92MHz; 
Transmission distance: about 60 meters in an open area; 
Voltage range: 110V—240V AC; 
Ringer volume: 100dB; 
Plug specifications: American regulations, Chinese regulations, British regulations, European regulations
Audio settings: 4 audio settings ( maximum-medium-minimum -> mute ); 

Package Includes: 
1 * Wireless Smart Doorbell;