* Display: Rear mounted mirror image arc digital LED * Distance Display, Sound Alarm, Orientation Indication, Zone caution， Dynamic Self-check * 4 rear sensors for full rear coverage * All weather design:-35¢XC～+70¢XC * Detection range: (1.15feet～8.00feet) * Volume adjustable switch * Operating voltage:DC10V～16V * Input≤4W * PKG: 4 rear 22mm sensors with 2.4m cable and 5m cable for display; standard controller with 1m power wire; 22mm hole saw and owner's manual/installation instructions. * G.Weight: 1.13Kg * Dimension: 309*230*61mm