The 1,300 lumen ProTac HL-X flashlight, built for durability and a sure grip, is available two ways: as a complete rechargeable system that includes their Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack (included) or can run on two CR123A lithium batteries.KEY FEATURESMulti-fuelTEN-TAP Programmable - Choose from three user-selectable programs: 1) high/strobe/low 2) high only 3) low/medium/highBATTERYMulti-Fuel: Uses one Streamlight SL-B26 protected Li-Ion USB rechargeable battery packAlso, accepts two CR123A lithium batteries MATERIAL/DURABILITY6000 series machined aircraft aluminum with anodized finishGasket-sealed glass lensAnti-roll face capUnbreakable pocket clipIP68; dust tight and waterproof to 2m2-meter impact resistance tested