This Car Reverse Backup Radar System consists of 4 Ultrasonic sensors, digital control box, and LED display, making the job of parking any vehicle much easier. It auto detects the distance between the car and back obstruction through the sensors installed at the rear bumper of the car. It helps to avoid the dangerous and costly collisions that occur so easily behind the wheel.<>Other Features: - With a drill head, convenient to drill hole on the bumper of the car - Be beneficial to prevent dangerous and costly collisions - Central AV controller box for easy connection - High quality, easy installation and operation<>Specification Rate voltage: 12V DC Rate operating range: 10.5V - 16V DC Rate current: 100mA - 300mA Detecting distance: 0.3 - 2.0m Ultrasonic frequency: 40KHz Control moudle working temperature: -30 - 80 celcius degree Display working temperature: -20 - 70 celcius degree Indicator size: 44x17mm (D x H) Sensor size: 19x25 (H x D) Main control box size: 90x60x23cm Main control box weight: 63g Items Included 1 * Main Control Box 1 * Sound Alert Indicator 4 * Parking Sensors with 2.5M Line 1 * Hole Saw 1 * Power Cable 2 * Double Side Sticker 1 * User Manual