NOTE - This USB heating scarf does not have a power storage function, which is powered by power bank, and ONLY works when plugged in. ONLY one scarf is included in the package, NO power bank is included. The scarf will fit directly into most rechargeable batteries, such as charger, rechargeable battery, laptop, USB adapter, etc FAST HEATING & THREE TEMPERATURES LEVELS - Adopted the latest graphene heating chip to quickly release heat and provide a steady flow of heat to the neck. The heated scarf has three temperature levels, GREEN-LOW TEMP about 40, BLUE-MEDIUM TEMP about 50, RED-HIGH TEMP about 60 Hand Wash Only Fastening: Pull On Winter scarf WASHABLE - The fluffy scarf is washable, and the built-in graphene heating chip is wrapped in a waterproof TPU layer, providing excellent insulation and waterproofing, with no risk of electric shock and can be washed without disassembling, making it easy to clean. Please fully air-dried before use ONE BUTTON OPERATION & EASY TO USE - Long press the switch for 3 seconds to turn on/off, a quick press of the switch changes the temperature modes. Because it only works when plugged in, this scarf has a hidden pocket near the switch so you can put your rechargeable battery inside without having to hold it in your hand all the time THE PERFECT GIFT - The heated scarf is made from soft and comfortable fabric to keep you warm during the cold days and nights. Easily wrapped around your neck and then charged up, you'll enjoy the ultimate in warmth and comfort to company you through the cold winter months. A great birthday or Christmas gift for parents, grandparents, friends and family Neck Heating Scarf, USB Powered By Power Bank, Winter Warm Plush Heated Pad, Portable Washable Neck Wrap Neck Warmer for Pain Relief, Power Bank NOT included ONE BUTTON OPERATION. Long press the switch for 3 seconds to turn on/off, Change modes Three temperature modes, 65(red), 55(blue), 45(green). Please Note: Powered by power bank, and ONLY works when plugged in. NOT rechargeable Universal USB port, can be powered by power bank, laptop, USB adapter, etc. The power bank is not included DC 5V / 2A Suggestions: If necessary, hand washing is recommended, do not wring or knead. Please remember to remove the power bank before washing Please fully air-dried before use, do not use when wet. During storage, do not crease the product by pressing heavy objects against it.