Led parking sensor: 1.3-color digital led display with buzzer built-in 2."bibi" audible warning buzzer in 3 steps 3.Volume switch control 4.Detachable sensor with waterproof socket connector (optional) 5.Digital meter distance mode, feet display available 6.Directional indicator of left and right 7.4 rear sensors for full coverage, 2 ~ 8 sensors for front & rear detecting is optional 8.Heavy rain-proof & all weather design 9.High quality and easy to install 10.All spare parts are compatible 11.Different sensors & colors optional (stick-on & insert-in) 12.Spare tire distance adjustment function 20pcs/carton Net weight: 13kgs/ctn Gross weight: 14kgs/ctn Carton size: 49x34x35cm