1. Three Color Mirror LED Display.                              
2. Natural human voice+Buzzer Type.                                                                      
3. Dual CPU, 4 sensors system.
4. Obstacle orientation indication.  
5. Operating voltage rating: DC12V.
6. Max power: Pmax< 5W.
7. Operating temperature: -40℃~80℃.
8. Display Distance: 0.3m~2.0m.
9. Alarm Distance: 0.3m~1.5m.                              
10. Alarm voice: > 80dB.
11. Ultrasonic frequency: 40KHz.                          
12. One year warranty