... easy installation. D:Wide beam&narrow beam foe option. Square Use as Vessels,Bus,Off-road vehicles,Trucks,Fire ... .. Innovated - vibration free mount stainless steel mounting bracket with rubber cushion. The good performance of tight waterproof,dustproof , quakeproof. ... vehicles,Trucks,Fire Engines,Forklifts,Mining,Trains,Tanks,etc Square Use as Vessels,Bus,Offoad vehicles,Trucks,Fire Engines ...