Crimson trace's rail master is an universal laser sighting system and has quickly took the market by storm.Each unit provides a universal fit for rail-attached pistols rifles and shotguns with picatinny 1913 accessory rails.It features instant "tap-on/tap-off" activation.This model has 420 (high) and 110 (low) lumen led white light cree xpl led bulb and waterproof aluminum body with black finish.Material: AluminumType: Tactical LightOutput: 420/110 LumensBulb Type: Cree LEDWeight: 4.10 ozBattery: CR123AProofs: WaterproofColor: BlackFilter Color: White