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 control 4. Probe distance all digital display 5. Smart start function 6. ★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 control 9. ★Probe distance all digital display 10. ★Smart start function Specification: Rate voltage: 12V DC Rate operating range: 10.5V - 16V DC Rate current: 100mA - 200mA Ultrasonic frequency: 40KHz Control moudle working temperature: -30 - 70 celcius degree Display working temperature: -20 - 60 celcius degree Sensor diameter: 22mm Installation mode: Drilling Color: Black Sound: Heart beat type, more recent alarm more rapidly Size: 25CM x 21CM x 6.5CM . Package List: 1 X Main Control Box 1 X LED Display 8 X Parking Sensor 1 X Power Cable 1 X Hole Saw 1 X User Manual