• Instead of using a battery, the button transmitter converts kinetic energy into electrical energy and sends a signal when pressed. No need to worry if the battery has power, so you won't miss important visitors
• It also has 38 kinds of ringtones for you to choose from, you can select the music you want according to your preference
• Easy to install. Just plug the receiver into a socket, and mount the button transmitter on the wall or anywhere you want
• Suitable for any home, townhouse, apartment, office, school, hospital, hotel, etc
• Waterproof design, can withstand adverse weather conditions without losing its functionality
• It is not only a doorbell, but also a pager. It can be installed beside the bedside of the elderly/babies/pregnant women. If necessary, just press the button to notify people

Specification:

• Working voltage: AC 100V-230V 50/60Hz
• Working frequency: 433.92MHz
• Modulation method: 00K
• Standby power consumption: 0uA
• Standby power consumption: 0.25W
• Music: 38 ringtones
• Controllable volume: ≥50dB/1m
• Receiving distance: ≥150 meters (open space)
• Receiver operating temperature: -10℃ ~ 45℃
• Transmitter operating temperature: -20℃ ~ 60℃
• Receiver size: 66*50*55mm
• Transmitter size: 70*46*23mm