High lumen tactical light that is USB rechargeable, so you can charge on-the-go using almost any USB source. It also accepts multiple battery sources to use as a back up so you'll always have power when you need it. - TEN-TAP? Programming - Choice of three user selectable programs: - 1.) high/strobe/low; 2.) high only; 3.) low/medium/high - High for maximum illumination: 850 lumens; 10,000 candela; 200m beam; runs 1.5 hours - Medium for bright light and longer run time: 350 lumens; 4,000 candela; 126m beam; runs 4 hours - Low for a less intense beam and extended run time: 85 lumens; 1,000 candela; 63m beam; runs 12 hours - Strobe for signaling or disorienting: runs 1.5 hours - Uses lithium ion battery (P/N 74175); also accepts two 3V CR123A lithium batteries or a commercially available Li-Ion 18650 rechargeable battery - Self-adjusting battery cradle secures multiple battery sizes and eliminates battery rattle - Rechargeable using supplied USB cord or optional AC wall adapter - Durable, anodized aluminum construction; IPX4 water resistant; 1 meter impact resistance tested - Water-resistant sliding metal sleeve protects USB port - Includes USB cord, removable pocket clip and tear resistant nylon holster - Multi-function, push-button tail switch for one-handed operation -C4? LED technology, impervious to shock with a 50,000 hour lifetime - A nti-roll head prevents the light from rolling away when you set it down - Removable pocket clip; nylon holster included - IPX4 water-resistant; 1 meter impact resistance tested - 6.50 (16.5 cm); 7.2 oz. (204g) with Li-Ion rechargeable battery (included in purchase) - RoHS compliant"