1、Self Powered Design: The doorbell set adopts self generating wireless design, no wiring, no battery, one press to convert kinetic energy into electric energy, convenient for using.2、Paging Function: Not only a doorbell, but also a pager. When a baby and the elderly sleeping alone, and pregnant women need help, they can press it, effectively protect your family.3、IP68 Waterproof Transmitter: The doorbell transmitter is IP68 waterproof and not afraid of severe weathers such as sun and rain, which can prolong the service life.4、Strong Penetration: Long distance signal transmission, strong wireless penetration through the wall, one to one signal pairing, don't worry about stringing with the next.5、Volume Adjustment: The volume is loud to solve the problem that the elderly cannot hear. You can also set one key mute mode to avoid disturbing, adjust volume at will.