4.92" overall. 1.97" head diameter. Black HAIII military grade hard-anodized finish aero-grade aluminum alloy housing. Four CREE XM-L2 U2 LED's. Five modes: Turbo 3800 lumen output with 45 minute runtime; High 1500 lumen output with 3 hour 15 minute runtime; Medium 480 lumen output with 9 hour runtime; Low 160 lumen output with 25 hour runtime; and Lower 3 lumen output with 433 hour runtime. 334m beam distance. Innovative two stage side switch accesses different modes and functions. Tactical forward switch on the tail cap. Integrated multi-function LED display. Integral power indicator in the switch displays remaining battery power. Thermal protection circuit prevents overheating. Optimal heat dissipation to improve overall performance. Toughened ultra-clear mineral glass with anti-reflective coating. Integrated "Precision Digital Optics Technology" provides extreme reflector performance. Uses four 18650 li-ion rechargeable batteries (not included). Waterproof up to 2m (IPX-8). Impact resistant to 1.5 meters. Comes with black nylon belt holster, lanyard, and spare O-ring. Boxed with hanging tab.