Wireless Doorbell Weatherproof White

AC doorbell, receiver (indoor unit) use household power supply, plug directly into the socket, no battery, environmentally friendly! The transmitter (outdoor unit) uses a battery for about one year. Use the same doorbell in one range, and will not interfere with each other! The wireless high-frequency transmission technology and the same-frequency different code effectively avoid the troubles caused by mutual interference and false alarms between neighbors.