- [ No Battery Required,Self Power Door Bell ] -No need extra battery for the Transmitter,press and transform kinetic energy into electric energy.then the transmitter release signal to active the door bell receiver.Save the energy to change battery and environment friendly.
- [ Strong Signal ] -Over 150 meters effective range and strong ability to penetrate wall,available for big house.
- [ IP68 Waterproof ] -Rainy days can be used ,safe &durable
- One Transmitter can Pair with Several Receiver no need worry miss the door bell ring of every important visitor
