Multi-fuel: Uses 2 Streamlight SL-B9 protected Li-Ion USB-C rechargeable battery packs or 2 CR123A lithium batteries SL-B9: 1500 lumens; 20000 candela; 283m beam distance; runs 1 hour CR123A: 1000 lumens; 15000 candela; 245m beam distance; runs 1.5 hours Battery compartment: Front-loading for rapid battery replacement Clamp system: Rail grip clamp system securely attaches/detaches quickly and safely with no tools Includes: Keys for a variety of full-size and compact railed handguns Material: 6000 Series machined aircraft aluminum with black anodized finish Features: User-programmable strobe; Ambidextrous momentary/constant on operation Waterproof: IPX7 waterproof to 1m for 30 minutes Dimensions: Length: 3.45 in (8.76 cm); Weight w/ SL-B9: 5.19 oz (147g); Weight w/ CR123A: 4.94 oz (140g) Warranty: Limited lifetime warranty Origin: Assembled in the USA Meet the fan favorite TLR-1 HL big brother. The TLR-1 HL-X multi-fuel, full-frame weapon light produces 1,500 lumens when using (2) SL-B9 rechargeable battery packs, or 1,000 lumens with (2) CR123As. It features interchangeable rear switches and a hinged face cap with robust release controls that allow for front-loaded battery changes without removing the light from the firearm.