Lamp base: CREE, high power LED. Made of high quality 6061T aluminum alloy, this flashlight is sturdy and durable enough for long time daily using Internal wiring applies the high efficient booster circuit, and can utilize the batteries in the largest extent. The body of this flashlight is built of aircraft-grade aluminum alloy, and it has a very solid construction. Waterproof, but don't put it into water long time Hard-Anodized finish; Anti-abrasive, free-scratch, shock-proof. Specifications: Model: KING Emitter Type: 10pcs CREE XM-L T6 LED LED Lifespan: 100, 000 hours Material: High quality Aluminum 3 Modes Arrangement: high low strobe Output brightness: Can come to above 20000 Lumens[lm] Bulb Quantity: 10 PCS Color: Black Light Color: White Battery Configuration:4x 18650 3.6v/3.7v battery (not include battery) Switch Type: Tailcap (middle) Lens Convex: Lens Dimension(mm):140*62*51 Net Weight (g): about 340g Package includes: 1 x XML T6 Flashlight Torch( NOT Include battery )