Features: *High-quality material: made of high-quality material, wear-resistant and durable, skin-friendly, won39;t fade, keep you warm all day long. *EASY TO USE: This brimless hat with 250 mAh rechargeables battery is USB rechargeable, simple and convenient, and the on/off switch is located on the light, the light is fixed and hiddens in the band. One button switch, simple and convenient. *Hand-Free Design : This brimless beanie hat is designed with a removable LED light design that is lightweight and portable, keeping you warm and safe while leaving your hand-free to do the work you need to do. *WASHABLE DESIGN : This LED knit hat is washable and easy to clean. Note: Please remove the light and batteries before washing. *WIDELY APPLICABLE: This hat is suitable for running, biking, skateboarding, outdoors, camping, hiking, jogging, handyman work, walking, snowmobiling, barbecuing, traffic monitoring, auto repair, ice fishing, dog walking, outdoor chores, etc. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement 3.Asian size is smaller than eu/us/uk size,please compare the detail sizes with your before purchasing. Description: Material: acrylic Size: 22*21cm Charging: USB direct plug Power supply: built-in 250 mAh battery Package List: 1 x Hat