---Automatically engages as soon as you place your car into reverse. 

--- LCD display with three colours changing according to the distance , Bi Bi voice warning. 

---Support safe HUD (head up display) mode:rotate the display face to car windshield and

     choice HUD mode to read the distance from windshield 

---2~8 pieces different color sensors is available 

---Easy installation 

---Power(DC): +9~+16 V 

---Operation temperature available: -35~+75 degrees 

---Human speaking warning is optional ---Wireless version is optional:No need to run a wire

    from the front of the vehicle to the rear .