1. Four flash sensors with english voice

2. The system will automatically start up when reversed

3. Insert ultrasonic sensor

4. English voice speaker alarm at different distance

5. Use USA CPU

6. Any color sensor is available and suitable for any car

7. The closer the obstacle, the faster the alert keep frequency on indicating the safety zone, caution zone, danger zone

8. LCD display, indicate the obstacle distance

9. Freely adjustable volume: High---lower---mute

10. Working voltage: 12V

11. Max power 5W

12. Working temperature: -40-----80 degree

13. Indication distance: 0.2----3.0m

14. Alarm distance: 0.4m-----2.5m