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) to charge. 2. There is a zipper pocket inside the heated scarf for storing a power bank, convenient for use and easy to fold and store. 3. Features a hidden switch button with a key switch/adjustment design. Press and hold for three seconds to turn on. The default setting is low heat. Click to switch between heat levels: blue indicates low temperature, green indicates medium temperature, and red indicates high temperature. 4. Using a 3500 mAh power bank as an example, the low temperature setting is approximately 42°C, the medium setting is approximately 48°C, and the high setting is approximately 55°C. The scarf automatically shuts off after 2.5 hours of use and can be turned on again manually. 5. The scarf is finely crafted with neat ing, 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 display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.