For Mercedes-Benz Sprinter VW Crafter Brake Light Reversing Camera+4.3" Monitor
You Could Wire It To A 12v Ignition Feed If You Wanted It Always On. Your High Level 3rd Brake Light Should Be Approx 38.6cm Wide and 5.4cm High. It Has A 170 Degree Viewable Angle With Mirror Image View And Is IP68 Waterproof.