1.CREE led with lifespan of 100.000hours; 2.Made of aircraft-grade aluminum; 3.Highly efficient SMO reflector for focused beam; 4.Durable Type III Hard-anodized anti-abrasive finish/Black; 5.TacticalOn/Off tail cap switch with memory function. 6.Anti-roll,slip-resistant body design. 7.Waterproof to IPX-6 standard; 8.Accessories: holster, lanyard,two spare o-rings and spare switch. ModePower/BatteryLumen(Max)Runtime(Max)Distance(Max)One(High)1*18650/2*16340/CR123A280200min180mRemark: Two/Three/Five mode are also available. Measurements: Length: 182mm Head Diameter: 57mm Tube Diameter: 25.5mm Tail Diameter: 31mm Weight: 220/245g Packing: Neutral packing(22mm*6mm*6mm)