Feature: The host & display is a wireless link Numeral & color LED display Alarm by three-step Bibi sound Left & night obstacle in dication Numeral display from 2.0 to 0 M Specification: Voltage: DV 9-15 V Rated voltage:DC12 V Power: Max 0.5w Respond distance:0.3-2m Alarm distance:0-2m Display mode:LED display Sensor Diameter:22MMInstall mode: Drill Sensor angle:X, Y, 60 Work temperature:-30℃~ +80℃ Alarm type: Buzzer (bibi...)FM power:10m WFM Frequency:433MHZPackage Included:1 X Car Reverse Parking Sensor System