Name: Foot warmer with USB interface Applicable gender: female Sole material: plastic Three levels of temperature adjustable: high-end: 47-55 degrees, mid-range: 43-47 degrees, low-end: 40-45 degreesPackage List 1 Pair of Shoes 1 Pc USB Cable Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size. 11. Warmth, softness and comfort: The material of heating shoes is made of thick wool combined with cotton padding, which is very suitable for keeping warm indoors. 22. High-quality heating materials: fast heating and high-temperature resistance. Three levels of temperature are adjustable, high level: 47-55 degrees, mid-level: 43-47 degrees, low level: 40-45 degrees. The working voltage is 5V, and the USB heating is very safe and reliable. 33. Waterproof and non-slip sole design: make winter shoes suitable for indoor and outdoor use in winter, and you can use the shoe warmer to enter the bathroom without changing shoes. In a dry outdoor environment, you can use a mobile power supply as a power adapter. You can also use the car charger to power the heated shoes while relaxing in the car. 44. Durable materials: Have a soft, wear-resistant interior and non-slip soles. The fabric is very elastic, and warm shoes can keep your feet comfortable and warm and prevent your feet from being frostbitten in winter. 55. Gift: It can also be the best gift for friends and family on Christmas and Thanksgiving. It is very suitable for keeping your feet warm when studying, working, chatting and watching TV in cold weather.