Wireless Door Chime (630-0872) Operation Faxback Doc. # 16485 Slide ON/OFF on the receiver to ON. When a visitor or deliver person pushes transmitter A's button, the transmitter's LED indicator lights and the receiver makes a bird sound. When a visitor or deliver person pushes transmitter B's button, the transmitter's LED indicator lights and the receiver makes a doorbell sound. If you don't want to be bothered by the door chime, slide ON/OFF on the receiver to OFF. (ALL-08/15/95)