SORRY, this product does NOT come with a power bank.At the same time, leaving the power bank, it will not work Let the heated scarf warm you anytime, anywhere: USB power bank power supply, as long as the power bank has electricity, the heated scarf can continue to heat up, outdoor climbing, going out shopping, playing in the snow, the heated scarf can keep you warm Machine washable:YES, it can be washed by machine, you heard it right, you no longer need to wash the heated scarf with cold water in winter, just leave it to the washing machine! This will not damage the product Three-level temperature control adjustment: The heated scarf has three levels, which can cope with different weathers, GREEN-LOW TEMP about 40, BLUE-MEDIUM TEMP about 50, RED-HIGH TEMP about 60 Comfortable fabric: The new fabric DuPont cotton is used to make the scarf more comfortable, skin-friendly material, you can wear it for a long time and keep it comfortable, when the scarf is heated, DuPont cotton can reduce the loss of heat and continue Makes you feel slightly warm and comfortable Pain relief and warmth: You can also use the heated scarf at home, it can effectively relieve your neck pain, you can also put the heated scarf on any painful and sore parts, hope this can relieve your pain and let you Feel comfortable