- Battery-free wireless doorbell requires no battery and no wire.
- It uses the unique energy harvesting technology and ultra-low-power wireless technology with worldwide patents pending.
- When users press the button, energy converting module inside will change the mechanical energy into electric energy.
- Then the wireless module of the button sends the signals to receiver.
- The receiver receives the signals and plays music/react.
Specifications are as below:
- Size: chime: 79x50x64mm; button: 86x86mm
- Transmitter: self-powered
- Operating temperature: -10~50
- Sound level: 80dbA@3ft(1m)