Uses one (1) Streamlight SL-B50® protected Li-Ion USB-rechargeable battery pack (included) Features TEN-TAP® programming - Choice of three user selectable programs: 1) high/strobe/low 2) high only 3) low/medium/high High: 2,000 lumens; 262m beam; runs 2.5 hours Medium: 570 lumens; 142m beam; runs 4.5 hours Low: 100 lumens; 60m beam; runs 25 hours Strobe for signaling or disorienting: runs 4 hours and 25 minutes IP67-rated; dust-tight and waterproof to 1 meter for 30 minutes; 2-meter impact resistance tested 6000 series machined aircraft aluminum with Type II MIL-Spec anodized finish Anti-roll head prevents the light from rolling away when placed on a flat surface 6.10 in (15.5 cm) 8.25 oz (234 g) with one (1) SL-B50® battery pack Includes USB-C cord, removable pocket clip, and nylon holster Available in black Limited lifetime warranty