Feature: 1. LED digital display with BiBi sound reminder. 4 sensor system, double CPU and advanced chipset to enhanced coverage and detection. 2. Be beneficial to prevent dangerous and costly collisions. 3. Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. 4. Detect small children and low walls as well. Anti-freeze and rain proof. 5. Easy installation and operation. With a drill head, convenient to drill hole. Specification: Car LED Parking Reverse Backup Radar with 4 Sensors Features: LED digital display with BiBi sound reminder. 4 sensor system, double CPU and advanced chipset for enhanced coverage and detection (0-2.5m). 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. Specifications: Sensor color: black 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 LED display size: 9 * 1.5cm Display weight: 88g Main control box size: 10.5 * 6 * 2cm Main control box weight: 63g Package including: 1 * Main Control Box 1 * LED Display Indicator 4 * Parking Sensors with 2.5M Line 1 * Hole Saw 1 * Power Cable 2 * Double Side Sticker Package List: 1 * Main Control Box 1 * LED Display Indicator 4 * Parking Sensors with 2.5M Line 1 * Hole Saw 1 * Power Cable 2 * Double Side Sticker