... Car Security System Max Detect Range: 1.5m/Custom-made, Transmitting Frequency: 40kHZ, Buzzer Sound Pressure Level: >80dB, Car ... :-E means cheap, almost half price compare OEM quality products,-Color display indicates obstacle distances as well as ... ,-Transmitting Frequency: 40kHZ,-Buzzer Sound Pressure Level: >80dB,-Detect Angle: Horizontal 120°, Vertical 60°,-Audio Warning:5 status, High quality ...