1.Why Choose Electric Foot Warmer - Electric Foot Heater means your feet and fingertips won't get warm by just heating the room using far infrared rays to keep them warm. You can use it at work without worrying about the ambient temperature. No need to prepare hot water, kerosene, etc2.USB Power Supply & Constant Heating Generation: The heat-generating core is warm and warm from heel to toe. The USB connector can be connected to a computer, power bank, power adapter, car charger, etc., making it very convenient for both indoor and outdoor use For better and faster heating effect, it is recommended to use USB interface with output current of 2A3.Thick villus & anti-slip: The inside has thick villus on the bottom and top. The entire surface is fluffy, and keeps your feet warm. The bottom sheet has anti-slip grains for excellent stability and security. 4.Washable with water and no noise: When you remove the heating and bottom sheet, you can put the cover into the net and wash it all the time, so you can keep it clean for longer. Machine wash and hand wash both No fuel, no smell. Easy to use with no noise during heat generation