Kaito Wireless Self Powered Doorbell works with the push of a button. Does not need any battery or power line to charge the transmitter. Does not need any wire for installation, easy and convenient to use. Transmitter can be used in both high-temperature and low-temperature environment. Waterproof transmitter is made of durable ABS plastic. Works with the push of a button, no battery needed on either button or receiver. Receiver works on 110V and 220V AC Does not need any battery or power line to charge the transmitter, and it transforms its own mechanical energy to electrical energy with the push of the button. Does not need any wire for installation. Easy and convenient to use Transmitter can be used in both high-temperature and low-temperature environment: from -40 to 60 degrees Celsius. Transmitter is made of durable ABS plastic Waterproof transmitter: can withstand heavy rain. Receiver is made of flame retardant and environmentally friendly ABS plastic Long wireless transmission distance: up to 500 feet (no obstacles, in open field). oEasy operation: the transmitter can be affixed to the wall with screws or adhesive pad and the receiver can be inserted to the power socket. 25 different polyphony ringtones to choose from. White
