... sensors 4.CE,Rohs,FCC Wireless LED Display Car Parking Sensor 1,To enter the reverse ... self-check.If some one not work the display willshow the driver the place which one broke ... 2,Three colors(red,yellow,green) five segment display,intelligent identify obstacles directions and distances.3,no ... exact obstacles distance indication. Specification:1,No display 2,Step-up Buzzer alarm3,Detective distance from ...