Features: Theparking system automatically recognizes and displays the distance tothe nearest obstacle, and the sensitivity of the sensor can be adjustedto prevent false alarms 4 sensor system Double CPU and advanced chipset for enhanced coverage and detection (0-2.5m). Help to prevent dangerous and costly collisions. Helpto provide increased safety for paengers, pedestrians and familymembers who happen to be around the moving vehicle. Detect smallchildren and low walls as well. Anti-freeze and rain proof. Easy to install. A saw drill head included. Specifications: Rate Voltage: 12V DC Rate operating range: 10.5V - 16V DC Rate current: 100mA - 300mA Detecting distance: 0.3 - 2.0m Control moudle working temperature: -30 - 80 Celcius degree Ultrasonic frequency: 40KHz Size:As picture Weight:About 358g Package included: 1 x Main Control Box 4 x Parking Sensors with 2.5M Line 1 x Buzzer Display 1 x Hole Saw 1 x Power Cable 1 x User Manual NOTES: 1. Due to different display and lighting effects, the actual color of the item may be slightly different from the color shown on the picture. 2. Due to manual measurement, please allow a little measurement deviation. 3. If you have any problem with the product received or your package is miing, please contact us in time, we will reply within 24 hours.