1. No display                                                                 
2. Step-up Buzzer alarm                                                       
3. Buzzer alarm switch:OFF,LO,HI
4. When braking ,the front sensors will work automatically                                         
5. When no obstacle(or keep same distance to obstancle in long time) in front of the car, front sensors will stop working automatically.                                       6. Detective distance:0.3-1.8m or 0.3-1.2
7. It can match all LED and TFTdispiay from our company          
8. 2,3,4 sensors for option