Creative Intelligent Waterproof Wireless Doorbell 2 Receiver 36 Chimes Door Ring DC Door Bell With LED Indicators For Home Use Radio battery, operates a doorbell system of one transmitter and two receivers. Both of the transmitter and the receiver is battery-powered, … [Read more...] about Creative Intelligent Waterproof Wireless Doorbell 2 Receiver 36 Chimes Door Ring DC Door Bell With LED Indicators For Home Use