Motion Sensor (490-0550) Features Faxback Doc. # 6167 The Safehouse Infrared Motion Sensor is a passive motion detector designed for use with alarm systems, such as Radio Shack Safehouse alarm systems. you can use the motion sensor to help protect your home while you are away and turn off the sensor while you are home. Dual-Element Detector-extends the sensor's coverage area and reduces false alarms. Test Indicator-lets you easily test the sensor to ensure correct operation. Sensitivity Controls-let you adjust the sensor for the best operation in the installed location. Pivoting Mechanism-lets you easily aim the sensor. Shielded Design-prevents interference from radio frequencies of 30 to 1000 MHz. (RLR-02/25/94)