Features 1. 3S Fast Heating: Heats up in 3 seconds with efficient graphene carbon fiber heating system. The Winter also can be warm. 2. Soft Material: The heated hand warmer is made of high-quality velvet material, double thickened, super soft, skin-friendly and durable, to create the largest heating area to provide maximum warmth for the front and back of your hands. 3. The Graphene Heated Hand Warmers can also helps relieve the pain of swelling, dryness and chapped hands, reducing chronic hand pain. 4. Convenient USB Port and Pocket: The USB port of this controller could be connected to a power bank, a computer, and in the USB port of a car. This allows the use of the hand warmer muff in the office, home, car, watch matches, or camping. 5. Proper Size: One size suits most girls, women, men. Perfect for people of any age who suffer from cold hands or arthritis. A perfect gift for your wife or husband, mother, grandmother, girlfriend, daughter, sister in cold winter. Specification Material: Fleece Color: Green, Pink Package Size: 29 26 7 cm Weight: 750 g Battery capacity: 10000 mAH Package Include: 1 Hand Warmer