1. security monitor with sounds in real-time 2. Bi..Bi.. 4 stages alarm to assist you well to reserve your car . 3 low price

More features of  the security monitor  as below:

1. simple installation

2. No dispay on the dashboard area.

3. Buzzer output sound adjustable.

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

5. 2,3,4 or 6 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

buzzer parking sensor system