This 9.5 inch high lumen tactical flashlight has a substantial feel, comfortable grip, and easily lights up large areas with its 3,500 lumen output. It accepts multiple battery sources, which means that it accepts a USB rechargeable battery or uses disposable lithium batteries, so that you always have a light when you need it.Features:3,500 lumens and 452 meter beam on HighSwitch to Low for 11.5 hours of runtimeBattery versatility - use Streamlight SL-B26 protected Li-Ion battery packs or disposable lithium batteriesHigh/Medium/Low/Strobe modesTEN-TAP Programming to choose your preferred operating modeAnti-roll head prevents it from rolling away when you set it downDurable aluminum construction and IPX7 water proofSpecifications:Batteries IncludedBattery Type: Lithium IonBattery Voltage: 3.7VLumen Levels: 3500 Lumens (High), 1000 Lumens (Med), 250 Lumens (Low)Runtime Levels: 1.5 Hrs (High), 3 Hrs (Med), 11.5 Hrs (Low)Includes: (2) SL-B26 battery packs, Dual USB cord, Wrist lanyard