Adjustable DuoFocus beam goes from spot to flood. Super Bright Cree LED never needs replacing. Anodized tactical aluminum housing. Water and impact resistant. Specifications: 3061 lumens on high, 754 lumens on low, 3 hour run time on high, 6 hour run time on low, 16000cd, 253m beam, 208mm total length. Requires (2) 18650 Li-ion batteries (included). Includes USB battery charger. FirePoint X flashlights feature a heavy duty design with improved thermal efficiency resulting in up to 20% better performance than comparable flashlights.