Multi-Fuel Innovation: Uses two non-rechargeable batteries (included) or one Streamlight USB rechargeable battery pack (not included) Shine the Light: 500 lumens, 6800 candelas, a beam distance of 165 meters and a run time of 2.75 hours on high mode Mission Ready: Ideal for your backpack, go bag, or pocket; Ready to use whenever you need it Choose your Mode: TEN-TAP programmable switch allows for user selection of one of three different programs: high/strobe/low (factory default), high only, or low/medium/high Built Streamlight Tough: IPX7 waterproof to 1 meter for 30 minutes; 2 meter impact resistance tested