PRODUCT DESCRIPTION Linear’s Xtended Range FM receivers and transmitters are designed for use in various wireless remote control applications. When the Model XR-4 receiver detects a signal from its companion transmitter, it will verify the digital code, activate the correct output channel, and trigger the remote device connected to the receiver. The XR-4 receiver has full supervision capabilities. If the “status” option is selected, the receiver expects hourly status signals from its transmitter