GEM-RECV Series receivers are the hardwired interface to Napco's Wireless-ReadyTM Control Panels. The wireless system comprises a compatible GEM-Series control panel, at least one GEM-RECV receiver and one or more companion GEMSeries transmitters. The transmitters may be wireless smoke detectors, space-protection devices, window/door sensors, or other devices that report zone status and supervision information to the receiver without the use of wires.