YueYueZou&reg; Car Vehicle Radar Parking System with 4 Sensors, Buzzing Alert, LED Display Help to prevent dangerous and costly collisions. Detect small children and low walls as well. Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Anti-freeze and rain proof. LED Digital Display And Easy to install 6 Piece Rear Parking System. 4 Ultrasonic Sensors. 4 Alarm mode - 3 colors - Green, Yellow, Red. One Year Warranty Included.