1. The heating scarf is made of fleece fabric, with a heating sheet in the middle, and the USB connector can be linked to a power bank (not included) for charging. 2. There is a zipper pocket inside the heated scarf for storing a power bank, which is convenient to use and can be folded and stored. 3. Hidden switch button with on/off and temperature control function; long press for three seconds to turn on, initial setting is low heat, single click to change levels: blue indicates low temperature, green indicates medium temperature, red indicates high temperature. 4. Using a 3500 mAh power bank as an example, low temperature reaches approximately 42°C, medium temperature approximately 48°C, and high temperature approximately 55°C. Automatically turns off after 2.5 hours of use and can be reactivated when needed. 5. The scarf is finely crafted with neat stitching, suitable for outdoor activities such as cycling, skiing, snowboarding, skating, mountaineering, climbing, and hiking. Weight: 0.09 kg Color: Black Material: 100% fleece Size: 26 x 14 cm Package Contents: 1 x Heated Scarf Note: Light reflection and differences in display screens may cause slight variations between the color shown and the actual product. Measurement error allowance is +/- 1-3 cm.