Feature:

Digital colored LED display
Easy to install
Anti-freeze and rain proof
4 sensor system and advance chipset for enhanced coverage and detection
Help to prevent dangerous and costly collisions
Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle
Detect small children and low walls as well

Technical Specification:

Rate voltage: 12V
Operating voltage: 10.5V - 16V
Rated current: 40mA - 300mA
Detecting distance: 0.3m - 2.5m
Ultrasonic frequency: 40KHZ
Operating temperature: -40°C - 80°C
Display working temperature: 0 - 60°C

System indicates obstacles by giving 5 different intervals of sound according to different distance:
Distance Sound alarm Awareness
1.5m-2.5m Silence Safe distance
1.0m-1.5m Bip…Bip…Bip Pay attention
0.5m-1.0m Bibi…Bibi… Be Alert
0.3m-0.5m BiBiBiBi…BiBiBi More Alert
0.0m-0.3m Continuous Dangerous distance