*Solar panel charge battery, which will supply power to the
 display after full battery. It will alter to onetime-battery
 if solar panel is weak.
*While in reverse gear, the screen will automatically by the
 signal send it by the control box and the system start to work
 automatically and display the distance with the nearest obstacle
*While not in gear, the display sleeps automatically and wakes CPU
 every 2 seconds to detect whether there is reversing signal

Technology Details:
Power supply of control box: DC 8V to 15V, power supply of control display: DC
0V to 3.6V
Display mode: LCD and EL background
Wireless transmitting between display and control box
Frequency: 433.92MHz >< 80kHz adjustment
Mode: FSK sensitivity: >-105dBm
Max power: 10mW (-10dBm)
Operating temperature of control box: -40o<>/supC ~ 80o<>/supC,
Operating temperature of display: -40o<>/supC ~ 80o<>/supC
Detecting distance:  
Wood of 30 x 30cm: 3m
¦µ80mm PVC pipe: 1.2m
Human: 1.2m  
Minimum distance: 0.3m
e) Accuracy: 3m >/< 3%