Engineered to produce a longer reaching, tighter beam; SL-B9: 1,000 lumens, 297m beam, runs 30 minutes (default) or programmable to 500 lumens, 210m beam, runs 1 hour; CR123A: 500 lumens, 210m beam, runs 1.5 hours; Multi-Fuel: Uses (1) Streamlight SL-B9 protected Li-Ion USB-C rechargeable battery pack (included) or (1) CR123A lithium battery; Laser mode runs 29 hours; Ambidextrous rear paddle switches with HIGH and LOW options; Safe-off feature prevents accidental activation; saves batteries; Rail grip clamp securely attaches/detaches without putting your hands in front of the muzzle; Durable, anodized machined aluminum construction; User-enabled strobe function; IPX4 water-resistant; Includes key kit, multi-tool, (1) SL-B9 rechargeable battery pack, and USB-C cord; Limited lifetime warranty; Assembled in the USA