1. The heating scarf is made of fleece fabric, with a heating sheet in the middle. 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 small items, convenient to use and can be folded for storage. 3. Hidden switch button with on/off and temperature control function. Long press for three seconds to turn on; initial setting is low heat. Click to cycle through heat settings: blue indicates low temperature, green indicates medium temperature, and 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. The scarf automatically shuts 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 different displays may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.