The Surefire® X300U-B Weaponlight is an ultrareliable weapon-mounted tactical light, designed to deliver exceptional clarity and lasting field service in virtually any tactical environment. Featuring a virtually indestructible LED emitter and operating on two 123A lithium batteries (included), this flashlight boasts an impressive 1,000-lumen maximum output, delivering up to 1.25 hours of consecutive use at full power. The proprietary TIR lens offers a focused beam of bright white light out to 213 meters, ideal for close- to longe-range operations, while the aircraft aluminum low-profile mount securely attaches to most Picatinny-style rails for exceptional reliability and quick, field-ready performance. Ambidextrous push-button controls offer quick operation for intuitive target acquisition and reliable light discipline. Better yet, this flashlight features an impact-resistant, optics-coated polycarbonate lens for scratch-free field performance in virtually any environment.). IPX7 waterproof. Compatible with pressure-activated DG and XT remote switches (not included) for precise weapon control.