*Wireless CPU to display communications
*No any wire between the main box and display
*Digital LED display showing obstacle distance
*Three stage colors showing the rear status
*Stage "Bi-Bi..." sound alert
*Different sensor types and colors available
*High-quality and easy installation  

Technical details:
Supply voltage: DC 12V(-/+2)
Working temperature: -40 ~ +80 degrees
Display distance: 2.0 to 0.3m
Alarming distance: 1.5m
Alarming volume: 75dB