Feature:1. When reversing the car, four probes behind the car are started. At the same time, the two probes on the left and right sides of the car will be activated, which effectively reduces the blind spot in the front left and right blind areas and prevents corner rubbing during reversing.2. The full-display reversing radar provides sound switching buttons. The user can use the display\u0027s switching button to mute, buzzer, Chinese/English voice (optional), or voice (optional)+beep sound patterns. Where you switch from one to the other.3. Full digital display reversing radar with 3 levels for volume control4. Probe distance all digital display5. Smart start function6. When reversing the car, four probes behind the car are started. At the same time, the two probes on the left and right sides of the car will be activated, which effectively reduces the blind spot in the front left and right blind areas and prevents corner rubbing during reversing.7. The full-display reversing radar provides sound switching buttons. The user can use the display\u0027s switching button to mute, buzzer, Chinese/English voice (optional), or voice (optional)+beep sound patterns. Where you switch from one to the other.8. Full digital display reversing radar with 3 levels for volume control9. Probe distance all digital display10. Smart start functionSpecification:Rate voltage: 12V DCRate operating range: 10.5V - 16V DCRate current: 100mA - 200mAUltrasonic frequency: 40KHzControl moudle working temperature: -30 - 70 celcius degreeDisplay working temperature: -20 - 60 celcius degreeSensor diameter: 22mmInstallation mode: DrillingColor: BlackSound: Heart beat type, more recent alarm more rapidlySize: 25CM x 21CM x 6.5CM .Package List:1 X Main Control Box1 X LED Display8 X Parking Sensor1 X Power Cable1 X Hole Saw1 X User Manual