6 1/4" overall. 2 1/4" head diameter. Roughly the size of a 12 ounce soda can. Three CREE XM-L LEDs. Five modes plus strobe. Turbo - 2,450 lumen output with 1 hour runtime; high - 1300 lumen output with 3 hour, 10 minute runtime; medium - 570 lumen output with 8 hour, 20 minute runtime; low - 300 lumen output with 16 hour, 30 minute runtime; and xtra low - 95 lumen output with 52 hour runtime. Uses either four 18650 Li-Ion rechargeable or eight CR123 batteries. (Batteries not included). Includes battery charger, black nylon belt holster, black cord wrist lanyard, and spare O-ring. Tiny Monster Series. Aerospace-grade aluminum alloy construction with anodized black HAIII mil-spec finish. Body is knurled for a sure grip. Features: Integrated Thermal protection circuit to prevent overheating; Single Button two-stage switch offers versatile functionality; coated mineral glass switch resists scratches; Integrated power indicator displays remaining battery power and voltage. Aluminum reflector ensures a smooth and powerful beam. Waterproof in accordance with IPX-8 (Submersible to two meters). Impact resistant to 1.5 meters. Boxed with hanging tab.