Military-Grade Multi-Battery System?: Fits 3 battery types (AAA/18650/21700) with built-in polarity protection. Includes free AAA holder and optional 2600mAh 18650 kit for extended adventures. ?Professional Zoomable Optics?: Slide-to-focus mechanism adjusts from 5 spotlight (100m throw) to 120 floodlight instantly. 98% light transmission lens eliminates dark spots for perfect illumination. ?Tactical Aluminum Construction?: Aircraft-grade aluminum with type III hard-anodized coating withstands 2m drops. Diamond-cut knurling ensures secure grip in wet conditions. ?All-Weather Performance?: IPX54 waterproof rating protects against heavy rain and dust. Operating range from -20? to 40? for extreme environments. ?Dual-Purpose EDC Light?: Tail switch with 50,000-cycle lifespan enables instant strobe for self-defense or steady light for camping/repairs. 86g ultralight design.