This knit hat and scarf set features a USB interface for easy charging, premium acrylic material for comfort, and a suitable temperature range of 40-50 degrees for outdoor winter activities. Ideal for skiing, snowboarding, snow shoveling, and more. A must-have for winter to keep you warm and comfortable in the cold. Features:1. Suitable Temperature: Winter warm electric heat hat with 40-50 degrees provides the appropriate temperature for everyone.2. USB Interface: With the USB interface design, the heated gloves hand warmers bag can be powered via your PC, power bank, car charger, and so on.3. Premium Material: Heated winter beanie hat made from acrylic, soft and comfortable to wear, perfect for sports & daily wear.4. Wide Application: This heat hat is ideal for skiing, snowboarding, snowmobile, snow shoveling, riding a motorcycle, climbing, hiking, hunting, mountaineering, etc. 5. Must Have For Winter: If you are spending a good deal of time outside in the winter taking care of various chores, especially shoveling snow, these USB electric heated hats can really help you out.Specification:Material: Acrylic FibresProduct Color: Black, Khaki, Gray, RedVoltage: 5VTemperature: 40-50 DegreesProduct Size: 20 x 20cm Product Weight: 150gPackage Included:1 x Electric Warm Heated Hat