... 4 sensors 4.CE,Rohs,FCC Tongyi hot sales Car LED display parking sensor car parking sensor Sensor:1,To enter the reverse, the radar system to ... automatically enter the working state and the sensors can self ... No display 2,Step-up Buzzer alarm3,Detective distance from 1.8m to 0.3m 4 ,2,3,4,6,8,sensors ...