Elife Hot Sell Popular Weatherproof 4 Parking Sensors Car Backup Reverse Radar Kit Voice Alert Radar Detectors + 5.0" The Vehicle Rearview Mirror Monitor+ LED Reverse Color Video Camera Kits This system uses four ultrasonic sensors to monitor the distance between the sensors and the closing objects when car is in reverse, Its a perfect solution for vehicles. With rear-view visibility: The system is complete with a monitor to install . 4 sensor system, double CPU and advanced chipset for enhanced coverage and detection; Detect the real distance between the vehicle and the object; Beeping Warning Alarm Sound. 5.0-Inch Digital TFT Car Auto LCD Screen Mirror Rearview Monitor has high image resolution ,compatible with PAL/NTSC. 7 IR LEDS night vision features high Resolution and 135 degree viewing angles.