---Automatically engages as soon as you place your car into reverse. ---Show distance by multi-functional ultra-thin VFD display,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 .