buzzer parking sensor

Main Features:
Wireless parking senor, there are not any wire between the display and the control box.
Rear 4 sensors for full rear coverage
2-side, 3-color LED indicator
Heavy rain proof design
All weather design ( -40癈~+80癈 )
Anti-false alarm patent
Easy installation
Technical Parameters:
Voltage:          12V
Temperature:      -30~+80癈
Input:             <4W
Beep volume:      70~90dB
Range ( Rear ):     0.3~2.0m
Wireless frequency : 433.9/315 MHz