Features ---Automatically engages as soon as you place your car into
reverse. ---Alarm with LCD display ---Embeded "bi.bi." buzzer and Colorful LCD display,
tri-color(Green,Orange,Red) background warning. ---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 .