5 5/8" overall. CREE XHP50 LED with max output of 2150 lumens in neutral white. 5-level brightness levels (Turbo, high, mid, low, ultralow) and 3 concealed special modes (strobe, SOS, location beacon). Micro-textured reflector allows for wide angle lighting. Black die-cast unibody aluminum alloy construction. Increased heat dissipation area. 2x 18650 batteries (not included) with runtime up to 325 hours. Ultra-clear mineral glass with anti-reflective coating. Stainless retaining ring protects core components from damage. Tailstand capability. Rear thumbscrew lock. Hang packaged.