... sensors 3.BiBi-alarm sound or voice 4.CE,FCC,e-mark,RoHS parking sensor : LED Parking Sensor System details: ... from 1.8m to 0.3m 5,Display unit with built-in buzzer 6,2,3,4 sensors ... 5. Easy installation. 6. It can be paired with wireless parking sensor, no need to run a wire ... LED Parking Sensor System also can add human sound warning function.Quality products,reasonable price and excellent customer ...