... auto parking sensor,LED Parking Sensor,Parking radar,car reversing aid 1.parking distance control Features:1) control box2) 4 ... indicate the orientation of obstacles, the number indicate the distance between obstacle and vehicle.Technical specification :Working voltage: ( ... Alarming volume: ≥63dBAlarming distance:1.5—0.1mDisplay distance: 2.5—0.3m auto parking sensor+parking radar+car reversing aid ...