技术参数：12v

  Key features:• 4 sensors system with 3-level volume choice
 audible buzzer 
                      • Compatible with rear nudge bars or tire
                      • Buzzer is loud enough to be mounted in trunk
                      • Extensional warning distance available
 (20cm/40cm)
                      • Self-test function
                      • Anti-false alert technology
                      • A visual display is optional​