Pyle PLPSE4P Parking Sensor System & LED Display 6 Piece Rear Parking System (Sensors x 4, Brain, Display) 4 x 1' Diameter Wired Rear Sensors (9 Foot) Digital Distance Object Wired Indicator (25 Foot) 4 Color 7 Stage Led Indicator 4 Stage Built-in Beeping Alarm Display Distance: 2.0m ~ 0.3m Reverse Sensor Trigger Sensor Cutout Tool Included Dc 12v Application Dimensions (Display): 0.75"" (H) X 4.25""(W) X 1.25'' (L) Dimensions(Brain): 1"" (H) X 3.65""(W) X 2.15'' (L) Sold as : Unit