Parking sensor( LED display, buzzer item )features: 1. Digital LED showing obstacle distance; 2. LED6-4 alarm by 3 steps; 3. LED display with three colors (red, yellow and green); 4. Working Temperature:-20 to 80°C; 5. Alarm and display distance: 04 to 2.0m; 6. Alarm Voice: more than 120dB; 7. Heavy rain proof design; 8. Anti-false alarm patent; 9. 2 to 8 sensors are available; 10. Turn on/off voice according to desire; 11. Various kinds of sensor colors and styles are available; 12. Easy to install.