This product is a 4 sensor rear parking assist system, it will warn you if there is an obstacle behind your vehicle. Combined with functions such as beep alarm, self-test and learning function, you can enjoy a convenient and easy parking experience.

Specifications:
- 4 sensor system with audible buzzer alert
- Can be used as 2 sensor system
- Dual intelligent function for Cars with tow-bar spare wheel or other protrusions
- Self test function
- Detachable sensor with water resistant wire connector
- All weather design (-40C ~ +85C)
- Input voltage: 12V DC
- Working power: <2.5W
- Detection range: 0.1~2.5m/0.3~8.2ft
- Alarm range (buzzer): 0.1~1.5m/0.3~4.9ft
- Buzzer SPL: 70 ~ 90dB
- Hole Size 18.8mm (Drilling Tool Included)