5 1/2" overall. Black HAIII military grade hard-anodized finish aero-grade aluminum alloy housing. Four CREE XP-L HI V3 LEDs. Five modes. Turbo - 3,500 lumen output with 1.25 hour runtime; high - 1,700 lumen output with 3.15 hour runtime; medium - 540 lumen output with 9.7 hour runtime; low - 95 lumen output with 48 hour runtime; and extra low - 3 lumen output with 1000 hour runtime. 704m beam distance. Uses four 18650 Li-ion rechargeable batteries or 4 CR123 batteries (batteries not included). Black nylon belt holster, black cord wrist lanyard, charging cable, and spare O-ring.