6 3/4" overall. CREE MT-G2 LED. Maximum output of up to 2000 lumens. 10 brightness levels. Features tactical strobe, slow flashing, quick flashing, location beacon mode, and SOS mode. Runtime of up to 325 hours. Black aerospace grade aluminum alloy construction with HAIII military grade hard-anodized coating. Waterproof and impact resistant. Tail stand capability. Uses two 18650 batteries (not included). Comes with nylon holster, lanyard, and spare O-ring. Hang packaged.