This is the rechargeable heated hand warmer that is ideal for cold weather activities that require the dexterity of bare hands, such as hunting or ice fishing. The hand warmer's gently curved sleeve easily accommodates your hands whether you're standing or seated, while a heating element of virtually undetectable wires provides soothing warmth. A removable, 7-volt Lithium rechargeable battery pack sets the interior temperature to one of four selectable levels, from 85º F to 135º F, and lasts for up to 10 hours at its lowest setting. The soft fleece shell is filled with hollow-core polyester insulation that allows moisture to escape so hands stay dry, and has neoprene cuffs that seal out cold and dampness. An adjustable nylon belt secures the hand warmer to waists up to 42". Requires a three-hour charge from the included AC charger. Two exterior zippered pockets hold the battery and charger. 16" L x 7" W x 3 " D. (3 lbs.)