Feature 1When 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. 2The full display reversing provides sound switching buttons. The user can use the display switching button to mute, buzzer, Chinese/English voice (optional), or voice (optional)+beep sound patterns. Where you switch from one to the other. 3Full digital display reversing system with 3 levels for volume control 4The sensors car in front,detection range can be accurate to 0.3 ~ 1.2m. 5Probe distance all digital display. Smart start function 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 Rear Parking Sensor Kit