... 3.rear 4 sensors 4.CE,Rohs,FCC Wireless LED Display Car Parking Sensor 1,To enter the reverse, the radar ... one broke down. 2,Three colors(red,yellow,green) five segment display,intelligent identify obstacles directions and distances.3,no cross interference ... .Clear pictures and exact obstacles distance indication. Specification:1,No display 2,Step-up Buzzer alarm3,Detective distance from 1.8m ...