About this item:【3 Levels of Temperature】- Heater scarf has 3-speed adjustable temperature,5 seconds fast heating, 3-color indicator lights correspond to different colors, red (warm mode) ~ 55 ℃; blue (comfort mode) ~ 45 ℃; green (energy-saving mode) ~ 35 ℃, you can always Adjust to your desired temperature.【Soft Material】- Warm scarf pad is made of durable, soft and comfortable fabrics, delicate touch, warm and breathable, skin-friendly and comfortable.Keep you warm in the cold winter.【USB Heating】- The heated scarf uses a USB link power bank to power up, the package does not include a power bank, and the scarf has a hidden zippered pocket inside, so you can put a mini power bank inside to heat the scarf at any time.【Perfect Winter.