parking sensor 1.cheap parking sensor 2.front & rear parking sensor system 3.4 sensors parking system 4: CE,FC c parking sensor certificates:CE,FC,ROHS, Buzzer parking sensor with 4 sensorsParameters1 ... 6:Have probe self-checking function buzzer detail:sensor detail:detail of the control box:paking detail: Car buzzer alart parking sensor,parking meters,parking system,distance sensor /parking sensor