Label:Yes With the ergonomic hand warmer, you can easily and comfortably pull it out of your pocket. Made of aluminum alloy and ABS materials, smooth, warm, portable, compact and non-slip with one h more→and. Ideal for arthritis patients who need hyperthermia. Also suitable for hiking, camping, mountaineering in the winter. It has three adjustable heating modes, precise temperature control, and intelligent thermostatic anti overheating. In addition to warming your hands, it can also be used as a backup battery for mobile phones, to charge your phone in an emergency. Specifications: Material: ABS, Aluminum Alloy, Electronic Components Output: 3.7V 2A Input: 5V 2A Charging Time: 5~6h Rated