USB Electric Heat Slipper-usb gadget 1.Carbon-fiber heating, healthy 2.Heating pad can be taken 3.USB Foot warmer,shear plush USB Foot Warmer Electric Heat Slipper Fleece Boot Shoes OEMUse computer USB to supply power, 5V voltage, safe and reliable;also can use AC adaper<5V,1A> Uses carbon-fiber as the heating materials, offering you the most comfortable temperature, Keep feet dry and comfortable in cold winter. During the heating process, carbon-fiber will generate far IR, which is  good to our healty. And it will not have electromagnetic radiation. It becomes warm in 1-2 minutes and 10 minutes up to the normal temperature 40-50 degree. Slippers can be washed conveniently. Heating pads can be taken out from the zip. And can be placed easily when boots dry. USB cable:1.5 m, white or blackmaterial:High-grade shear plushSize: about 34*33 cmNon-slip base