... Automatically works when reversing. 6. Show distance by digital display, Bi Bi sound. 7. Embedded detector sensors (which require installation into your ... rear bumper). 8. High-tech processing, High-quality detector sensor, Beautiful line type figure. 9. Easy installation. 10. Factory ... -35°C~+80°Csensor2,3,4,6,8, optionalDetect Distance 0.3~2.5 MApplicationAll CarAlarm Distance0.3~1.5 ...