3.5'' LCD Monitor Video Parking Senosr:

Measuring the distance by 4 sensors, the obstacle distance & Image displayed on the LCD screen
Turns on automatically when you begin you reverse.
Measure distance between 0.4 to 2.5m
The monitor is 3.5-inch size, standalone on dashaboard, looks nice.
With night vision camera so that you can see the obstacle even at night
Waterproof and shockproof, anti-fault information technology.
High-quality and easy installation.

Technical Parameters:

Rated voltage: 12V DC
Operating range: 10.5 and 16V DC
Rated current: 100 and 300mA
Detecting distance: 0.4 to 2.0m
Ultrasonic frequency: 40kHz
Working temperature: -20 to +80 degrees
Camera angle: 120 degrees
Camera size: 28 (R) x 42 (L)mm

Package Includes:

1x LCD display monitor
1x Night vision camera
1x Main control box
4x Parking sensor
1x Power cable
1x 22mm driller for sensors
1x Drill for camera 
1x English manual