1. The heating scarf is made of fleece fabric, there is a heating sheet in the middle, and the USB connector can be linked to the power bank (not included) at any time to charge. 4. Take 3500 mAh charging treasure as an example, the low temperature gear is about 42 °C, the medium temperature range is about 48 °C, and the medium temperature gear is about 55 °C, which automatically close after 2.5 hours of opening each time, which is , and can be opened again later. 3. Hidden switch button, key switch/adjustment design, long for three seconds to turn on, the initial gear is low, click to switch gear, blue is low temperature, green is medium temperature, red is high temperature. 2. There is a zipper pocket inside the heated scarf for charging treasure, which is convenient to use and can be folded and stored. 5. The scarf is finely made and neatly stitched, suitable for outdoor cycling, skiing, snowboarding, skating, mountaineering and climbing, hiking and other scenes.