Features:- The inside is made of very soft plush cloth and insulated cotton with the elastic of the material to wrap tightly around your feet, which will be as warm as in your mother's stomach.- USB heated shoes can be heated quickly and at high temperatures, up to 150 degrees Fahrenheit. This heat-generating material can be washed and bent. Warm shoes work at 5V, very safe and reliable.In an outdoor dry environment, a portable power source can be used as a power adapter. You can also use car charger to keep warm shoes when you are relaxing in the car.- You can adjust the temperature according to your needs: 60, 55, 45 degrees, and you can also let the warm shoes work in your specified time period: 60 minutes, 30 minutes, 15 minutes.Specifications:- Size: 31*12cm - Material: Plush- Input voltage: USB/5V - Package content:- 1 Pair x Electric ShoesNotes:1. Manual measuring, please allow 1 ~ 3mm error,thank you.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.