5 3/4" overall. Indestructible Mil-Spec grade 1" aluminum body. CREE XM-L2 U2 LED with up to 460 lumen output. Seven modes: Momentary on (460 lumens); Turbo (460 lumens, 1hr 20min); High (200 lumens, 2hr 40min); Medium (100 lumens, 5hr 50min); Low (20 lumens, 50hr); Strobe (460 lumens); S.O.S. (200 lumens). A 18650 li-ion rechargeable battery with USB cable (included). Patented Duo Switch with click and tap function for easy momentary activation and mode switching. Waterproof and dustproof. Impact resistant. Hang packaged.