The JETBeam JET-1MK is a compact flashlight specially designed for everyday carry, camping, and emergency use. A removable clip allows comfortable pocket carry and keeps the flashlight ready for quick access. The JET-1MK runs on a single 14500 or AA battery (not included). Features: Lightweight aluminum body offers high durability and portability. Simple twist output mode selection. Built-in effecient power management circuit. Battery reverse polarity protection. Mode: Output / Runtime High (14500 Battery): 480 lumens / 30 minutes High (AA Battery): 150 lumens / 1+ hours Mid: 30 lumens / 9 hours Low: 1.5 lumens / 100 hours