This is a intelligent parking assist system. It helps a lot when parking your car.

Features:
4 sensors system with LED display.    
Anti-false alert technology.    
Self-test function.    
All weather design， works well in rain.
Alarm by three-step Bibi sound.

Specifications:
Input Voltage: 9-16V DC
Beep SPL: 70-90dB
Display Range: 0.3m-2.5m / 1ft-8.2ft
Buzzer Range: 0.3m-1.5m / 1ft-4.9ft
Sensor Installation Height: 45cm-65cm
Package Size: 17 * 17 * 9.5cm / 6.7 * 6.7 * 3.7in
Package Weight: 493g / 1.1lb

Package List:
1 * Host
1 * LED Display
4 * Sensor
1 * Set Installation Accessory
1 * English User Manual