This hand warmer adopts a rechargeable design, with ultra-long battery life and constant temperature, the design is delicate and compact, and fits the design of people's palms, making it more convenient to hold and easier to carry and use when traveling. Not only that, but it can also be used as a power bank, with a capacity of 5,000 mAh to meet your basic charging needs. This hand warmer has a variety of colors for you to choose from, and you can also freely