USB power interface: It can be used to charge via computer USB interface, mobile phone power interface, power bank, etc. Easy to use: Winter heating pad with large pocket, convenient to put feet and hands in, easy to keep warm. Rapid heating: immediately heat and energize, reach the rated temperature within 3 to 6 minutes. Very suitable for family, office, outdoor walking, camping, etc. Washable and durable: This kind of can be divided into internal heating jacket, jacket and invisible zipper jacket. The inner heating cover can be removed by opening the zipper for cleaning. High-quality thermal insulation materials: products made of flannel fabric, in which the heater is composed of high-grade carbon fiber. The electric heated foot warmer has a 360 surround design, the soft and thick coral fleece cover will keep the heat inside the pad and make you feel warm. Perfect gift for your family, friends and partners. Constant Temperature: Electric foot warmer with a constant temperature of 50-60 , safe to use, don't worry about it will burn your feet. Plug and Play: Fast heating, easy and quick to warm your feet. Soft and comfortable, breathable and durable. Size: 30*30/11.81*11.81 inches Material: flannel Color: Gray Delivery quantity: 1 piece / 1 * foot warmer1 * USB charging cable