... 4 sensors 4.CE,Rohs,FCC Wireless LED Display Car Parking Sensor 1,To enter the reverse, the radar system to automatically ... obstacles distance indication. Specification:1,No display 2,Step-up Buzzer alarm3,Detective distance from 1.8m to 0.3m 4 ... ,2,3,4,6,8,sensors for optionPacking:Unit Weight:0.56KgQTY: 20 pcsN ... kg /ctnMEAS:53*32.3*42cm Wireless LED Display Car Parking Sensor