5.5 Inch overall. Strobe. Rechargeable. Water resistant. Impact resistant. Tailcap switch. SOS strobe. Lanyard. NiteLab UHI 40 LED. Modes: Turbo (3300 lumens, 30m runtime); High (1200 lumens, 4h 30m runtime); Mid (300 lumens, 8h 30m runtime); Low (50 lumens, 50h runtime); Ultralow (1 lumen, 650h runtime). SMO reflector. 505m beam distance. Sensor protection function. USB-C rechargeable. U-shape tail cap. Detachable two-way clip. Advanced temperature regulation. Includes spare O-ring and holster. Requires (1) 21700 battery (included). Aluminum construction. Color: Black. Boxed with hanging tab.