Car Security System Max Detect Range: 1.5m/Custom-made, Transmitting Frequency: 40kHZ, Buzzer Sound Pressure Level: >80dB, Car Security SystemFeatures:-E means cheap, almost half ... DC12V,-Operating Temperature: -40°C to +85°C,-Max Detect Range: 1.5m/Custom-made,-Transmitting Frequency: 40kHZ,-Buzzer Sound Pressure ... 60°,-Audio Warning:5 status, High quality and reasonable price car security system