Heat at the press of a button Zippo's Rechargeable Hand Warmers keeps you warm from the office to the woods. The convenient power bank feature recharges your USB compatible device so you can stay connected while enjoying the outdoors. The rechargeable hand warmers easily fits in an out of pockets, provides plenty of heat to keep your hands warm in cold weather, and lets you adjust the heat duration and level to your needs - short or long. Recharge the hand warmer via the included charging cable. Great to use for gaming, outdoor sporting events, indoor offices, and other cold weather usage occasions. Comes packaged in a window box.