Powerful Long-Range Beam: 1000 lumens of LED illumination with a 374-meter beam and 35,000 candela intensity, ideal for search & rescue, security, outdoor excursions, or tactical use Flexible Brightness & Runtime: High, Medium, Low, and Strobe modes give you full control over brightness and runtime, from intense illumination to extended runtime or signaling Multi-Fuel, Always Ready: Uses included USB rechargeable battery but also accepts two CR123A non-rechargeable batteries, (not included User-Customizable Modes: TEN-TAP programmable mode selection (High/Strobe/Low, High-only, or Low/Med/High) lets you customize output to your mission from stealth to full-power illumination Built Streamlight Tough: Durable machined aircraft-aluminum body, sealed glass lens, anti-roll head, pocket clip and holster plus IPX4 water resistance and impact-tested housing for reliable performance in harsh conditions