FEATURES: Multi-media car-reversing back-view voice-reminding system, consists of high definition water-proof infrad nightvision camera, ultrasonic detector distance sensor, intellectual voice-directed orientation and distance, control module. When reversing gear is engaged, the system will work automatically. The rear image of the obstacle, direction and digit distance display will be shown on the monitor along with the English speaking indication Integration of video, digital & voice reachable. Directing the driver to park the car . 1. Detector type: drilling 2. 3-digital display the distance 3. Sensors and rear camera start to work automatically when reverse gear is engaged 4. Front sensors start to work upon ignition of engine. Rear sensors are activated when reverse gear is engaged. Front sensors do not work when vehicle in reverse 5. the indicator light direct the left, middle and right 6. stage-by-stage sound alarm to avoid colliding; the voice could be adjusted, with mute setting 7. Versatile detection range 8. Sensor types for optional Specifications: 1. Working voltage: 12V 2. Input: 4W(max) 3. Beeper: 90-105dB 4. Working temperature: -40~+80°C 5. Frequency: 40KHz 6. Best detection distance: 0.5-1.5m 7. 3.5" Monitor on rear-view mirror