Car Security System Max Detect Range: 1.5m/Custom-made, Transmitting Frequency: 40kHZ, Buzzer Sound Pressure Level: >80dB, Car Security SystemFeatures:-E means ... : 1.5m/Custom-made,-Transmitting Frequency: 40kHZ,-Buzzer Sound Pressure Level: >80dB,-Detect Angle: Horizontal 120°, Vertical 60°,-Audio Warning:5 ...