Features: Three Temperature Settings: The heated scarf features low, medium, and high heat levels to meet different warming needs in various environments. Fast Heating Technology: It warms up within 3 seconds after being powered on and provides continuous heat for up to 10 hours in lab conditions. Built-in Rechargeable Battery: Equipped with a 7.4V 2000mAh lithium-ion battery and Type-C charging port, compatible with power banks for convenient charging. Soft Fleece Material: Made of skin-friendly and breathable fleece fabric that is comfortable to wear, offering both warmth and stylish appearance. Overheat Protection: The automatic temperature control system prevents local overheating, ensuring safe and worry-free use. Specifications: Material: Polyester Fleece Size: 81*10cm Heating Levels: Low Level Approx. 35–40°C, Medium Level Approx. 45–50°C, High Level Approx. 55–60°C Charging Time: Approx. 2 Hours Usage Time: Low Level Approx. 8–10 Hours, Medium Level Approx. 5–6 Hours, High Level Approx. 3–4 Hours (Lab Conditions) Power Interface: Type-C Charging Port Include: 1 * USB Heated Neck Warmer 1 * Type-C Charging Cable (Approx. 50cm Length) 1 * Chinese/English User Manual