... SystemFeatures:-E means cheap, almost half price compare OEM quality products,-Color display indicates obstacle distances as well as ... ECU/ buzzer/buzzer cable/power cable,-Audible alert, the closer the obstacle, the faster the beep frequency,-Rated Voltage: DC12V,-Operating Temperature: - ... : Horizontal 120°, Vertical 60°,-Audio Warning:5 status, High quality and reasonable price car security system