1.switch on the power and the system start automatically2.the display unit display digits and figures, with audio alarm, indicating thedistance between barrier and the vehicle.3.Multi-functional ultra-thin LCD display, LCD display dimension :62.2*40mm ( thickness:2mm)4.Automatic switch over of temperature after the reverse gear exits (temperaturedisplay is an additional functional, a temperature difference of 1-2 oCunder different operating condition is normal.)5.when the display is witched on, the alarm sound is on automatically. ON/OFF ofthe alarm is optional6.Human voice distance report (optional)7.Bionic sensor design (with light of)8.Flashing of sensor while the vehicle is being reversed of turned, or the night-drivinglight is on (only for sensor with light) producing area:China supplying capacity:100,000sets/month