The wind can be adjusted,USB convenient and fast charging for 20 minutes, can last for 8 hoursCOMFORTABLE DESIGN: A cap that has a mini fan cooling the face, strap design, make you easy adjust size to match you need.100% brand new and high quality.Charging red light, full of bright blue lightsIncrease battery capacity, explosion-proof lithium battery（It has 400 mAh lithium battery）OCCASION: Great for the summer, perfect for outdoor activities, as cycling, hiking, walking, golf, baseball sport and so on.What you Get:1 PC HAT+1 PC USB charging cable+ 1PC FanSize:52-58CMMATERIAL: This cap made of cotton material, it is durable, breathable, comfortable and lightweight.