USB Heated Insoles Size 35-46 DIY Customizable Electric Heated Shoes working with powerbank for many hours Specifications: Color: Black Material: Carbon Fiber Function: Foot Warmer Applicable Gender: Unisex Maximum Voltage: 5V Features: High conversion efficiency, energy saving, the average hour with one degree of electricity. Easy to cut to the size you need. Applicable to various shoe types. Make your foot more comfortable and warm. Removable design, convenient and clean. USB charger,connected to PC, laptop,charger, keep your feet warm indoor. Package Includes: 1 Pair X Heated Insoles 1 X USB Cable