5 5/8" overall. CREE XP-G2 (R5) LED. 360 lumens. Aero grade aluminum alloy construction with HAIII military grade hard-anodized coating. Maximum runtime of up to 30 hours. Secondary red LED provides constant/flashing illumination. Uses two AA batteries (not included). Detachable two-way anti-rolling clip. Waterproof and impact resistant. Tail stand capacity. Comes with nylon holster, clip, lanyard and spare O-ring. Hang packaged.