Visible parking sensor 
External connected display
2 video input (AUX and camera) 
Video output w/mixed video and distance status.
10-stage simulate obstruction distance display
3-stage "Ding Ding" alarm sound
Option: voice alarm available
2, 3 or 4 sensors are available
Rated voltage: 12V DC
Operating voltage range: 10.5~16V (15~27V)
Rated current: 20mA ~ 150mA
Distance detection: 0.2 ~ 1.5M
Ultrasonic frequency: 40MHz
Working temperature: -20°C ~ +60°C......