Car Security System Max Detect Range: 1.5m/Custom-made, Transmitting Frequency: 40kHZ, Buzzer Sound Pressure Level: >80dB, ... products,-Color display indicates obstacle distances as well as orientation,-Components Included: 4 sensors/ECU/ buzzer/buzzer cable/power cable ... 40°C to +85°C,-Max Detect Range: 1.5m/Custom-made,-Transmitting Frequency: 40kHZ,-Buzzer Sound Pressure Level: >80dB,-Detect Angle ...