Features: 1. 3-Speed Temperature: 40, 50, 60, press the on/off key to switch, to meet different heating demands. 2. 3s Fast Heating: Contains graphene heating sheet, heating and releasing infrared light wave radiation heat, close to the wavelength of human body, easy to penetrate the skin, absorbed by the human body. 3. USB Powered: The portable hand warmer is powered by USB and features a zippered pocket that can be used to hold a power bank (optional), you can take it when you go to travel, camping, hiking, and so on. 4. Soft Material & Machine Washable: Since the electric hand warmer is made of soft material, it provides more comfort than others. Besides, it's easy to clean, just hand wash in cold water or machine wash in a laundry bag (not included). 5. Thoughtful Gift: Stylish and warm gift is a must-have for you and your lover in the upcoming cold winter, it is an excellent birthday gift or holiday gift for children, friends, or family. Specification: Material: Cloth Product Color: Yellow, White, Silver, Green Product Size: 400 x 265mm Product Weight: 166g Package Included: 1 x Hand Warmer or 1 x Hand Warmer + 1 x 5000mAh Power Bank