Key features: Switch on automatically when reverse gear is engaged 2/4/6/8sensors design,6/8 sensor designed for detecting Obstacles from both front and rear bumper of car Intelligent blue backlight LCD display. Digital,direction,visual and acoustic alert 15 different warning phases Operating mode: ON/OFF/MUTE Embedded installation Technical data: Working Voltage: 10~ 15 V Max. Power: 3.6W Working temperature: - 35℃~ + 70 ℃ Detecting distance: 0.1 m ~ 1.5 m Measuring error: ?.05 m Sensor detection angle: 60 ? Alarming Volume of built-in Siren: 80dB Alarming Volume of external Siren: 80dB Response Time: 250 ms Ultrasonic Frequency: 40KHz Current Consumption: 240~300 mA