... SystemFeatures:-E means cheap, almost half price compare OEM quality products,-Color display indicates obstacle distances as well as orientation ... Included: 4 sensors/ECU/ buzzer/buzzer cable/power cable,-Audible alert, the closer the obstacle, the faster the beep frequency,- ... Detect Angle: Horizontal 120°, Vertical 60°,-Audio Warning:5 status, High quality and reasonable price car security system