Car LED Parking Reverse Backup Radar System with Backlight Display + 4 Sensors Blue.   Features: LED digital display with BiBi sound reminder.  4 sensor system, double CPU and advanced chipset to enhanced coverage and detection.  Be beneficial 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 installation and operation.  With a drill head, convenient to drill hole.   Specifications: Sensor color: Dark Blue;  Rate voltage: DC12V;  Operation voltage range: 9-16V;  Rate current: 20mA-200mA;  Detecting distance: 0-2.5m;  Ultrasonic frequency: 40KHz;  Control moudle working temperature: -30-+ 70 celcius degree;  Display working temperature: -20-+60 celcius degree;  Sensor size(H * D): 1.9 * 2.5cm / 0.75 * 0.98in;  LED display size: 9.9 * 2 * 2.6cm / 3.9 * 0.79 * 1.02 in;  Main control box size: 10.5 * 6 * 2.3cm / 4.13 * 2.36 * 0.91in;  Display weight: 89g / 3.15oz;  Main control box weight: 63g / 2.22oz;  Item weight: 355g / 12.52oz;   Package includes: 1 * Main Control Box;  1 * LCD Display Indicator;  4 * Sensors with 2M Line;  1 * Hole Saw;  1 * Power Cable;  2 * Double Side Sticker;  1 * User Manual