... corlor: 64 kindsdisplay distance: 0.3-2msensor theory: ultrasonic sensoralarm distance: 0.3-2.5msensor line: 2. ... 1.5m. Alarm voice: >80dB at 10 cm.Ultrasonic frequency: 40KHz. 4.Packing of products:corlor neutral box ... /Service (We Sell):Parking distance control,parking sensor system,parking sensor,camera parking system,video parking system,video parking radar,camera parking sensor,distance control,car ...