1. security alarm with digital indicator in real-time 2. 7 stages LED distanace waves. well to avoide accident .

More features of  the security alarm as below:

1. Mini colorful LED display. Easily installation

2. 3colors * 7 stages LED waves to show distance .

3. Digital meter to indicate actual distance

4. 4 stages alarm sounds from 1.5m to 0.3m

5. 2 or 4 ultrasonic sensors are available

6. anti-freezing,waterproof,work well under very cold weather.

All the above 6 features make it assist

to reverse your car or bus accuratly.

7. Voltage:10.5~ 16V DC ; Current: 10mA~100mA

8. Detection distance: 150~30 cm

9. Ultrasonic frequency: 40KHZ

10.Working temperature: -20 ~ +80

auto security alarm system