Note: this product does not contain mobile power bank This product needs to be connected to a power bank to keep it hot all the time, without charging function 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 The heated scarf has three temperatures: high temperature (red), medium temperature (blue), and low temperature (green). You can adjust the temperature according to weather conditions. 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 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 Specification: Size & Fit: One size fits all, Unisex Dimensions: 80cm x 10cm Connector: Standard USB LED: Glowing Red/White/Blue Package: 1*heated scarf Note: 1. This product is shipped without batteries (a USB powerbank), and you need to use your own powerbank 2. Please do not connect to the powerbank with the scarf when not in use for a long time 3. The heating time depends on the capacity of the powerbank 4. Do not use high temperature water or strong acid detergent