DEI 508D Dual Zone Convertible Top Proximity Motion Car Alarm Sensor for Viper
DIRECTED ELECTRONICS 508D. MODEL: 508D. (1) DEI 508D Digital Tilt Motion Sensor. INVISIBEAM FIELD DISTURBANCE SENSOR. TYPE: Car Alarm Field Disturbance Motion Sensor. Field Disturbance Motion Sensor for Interior and Exterior of Vehicle.