Britax BF620 Series LED Twin Beacon 5000 Lumen die-cast alloy base with dual SAE J845 Class 1 LED beacons. Aerodynamic polycarbonate lens on die-cast alloy base sealed by one piece, triple blade rubber sealing gasket providing dust, water, high pressure washing and vibration resistance. 6 flash patterns, multiple bolt mounting options (8 bolt holes provided). 10-30V multivoltage. IP68 rated Goretex breather in base with dual BF600-00 IP67 rated internal beacons.