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) to charge at any time. 2. There is a zipper pocket inside the heated scarf for storing a charging device, convenient to use and can be folded for storage. 3. Hidden switch button with on/off and temperature control function; press and hold for three seconds to turn on, initial setting is low heat, single press 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 setting reaches approximately 42°C, medium around 48°C, and high temperature up to 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: 0.09KG Color: Black Material: 100% Fleece Size: 26x14cm Package Contents: 1 x Heated Scarf Note: Light reflection and different displays may cause slight color variation from the actual item. Measurement allows an error of +/- 1-3cm.