Specification: 1. Rate Voltage: 12V 2. Operating Voltage Range: 9~16V 3. Rate Current: 20~200mA 4. Detecting distance: 0.2 - 2.5m 5. Ultrasonic Frequency: 40KHz 6. Working Temperature: -30~80C 7. Display Working Temperature: -20~60C Features: 8 sensor system, double CPU and advanced chipset for enhanced coverage and detection (0.2-2.5m). With digital colored LED display (number & light). Help to prevent dangerous and costly collisions. Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Detect small children and low walls as well. Anti-freeze and rain proof. Easy to install. A saw drill head included. Way of working: 1. When the vehicle is reversing, the rear radar automatically starts to work. 2. the end of the reversing, the radar in front of the car automatically opens, to detect, to prevent scratching, especially in the right front corner of the vehicle, 3. When the vehicle is not reversing, the brake is pressed, the front radar is turned on, and the work is stopped for about 10 seconds. Package: 1 x Main Control Box 1 x LED Display 8 x Parking Sensors 1 x Power Cable 1 x Hole Saw 2 x Double Sided Adhesive Pad 1 x User manual