Main Features:

.Buzzer is built in LED display
.Apply reflection principle of electromagnetic wave
.Detection in all directions
.No need to drill on car
Three types of signals detecting:
a. continuous sound of "beep" approximately between 0-0.3m
b. short interval sound of "beep" approximately between 0.3-0.5m
c. long interval sound of "beep" approximately between 0.5-0.7m
.Easyinstallation (DIY)