5.13 overall. Strobe. Water resistant. Impact resistant. Tailcap switch. Lanyard. Anti-roll design. SOS strobe. CREE XHP35 HD E2 LED. Modes: Turbo (1800 lumens, 30m runtime), High (980 lumens, 1h 15m runtime), Mid (300 lumens, 4h 15m runtime), Low (55 lumens, 20h runtime), Ultralow (1 lumen, 300h runtime). 255m beam distance. Beacon location mode. Single button offers access to all brightness levels and modes. Integrated power indicator light. Reverse polarity protection. Optic lens with anti-reflective coating. Best when used with the high performance 8A output battery (item# NCNL1835HP) Requires (1) 18650 battery (not included), or (2) CR123A batteries (not included). Aluminum construction. Color: Black. Boxed with hanging tab.