1pc Gray Graphene Hand Warmer, 3-Gear Adjustable Temperature, USB Powered: Double-Sided Plush Heating Pad, 4 Pcs 13*18cm Large Heating Area, Smart Temperature Control For Outdoor/Office/Home Use. Can Be Used With Power Bank, Machine/Hand Washable, Ideal Gift For Couples/Family In Winter, Suitable For Halloween, Christmas, New Year