LED baseball cap glows in 7 colors - Red, Green, Blue, Gold, Light Blue, Purple, White; and 5 Light Mode - Monochrome, Flash, Gradual, Smooth, Polychromatic. The vibrant light Up designs are surely eye catching. Use single-button switch 7 colorful lights, 4 flashing modes. Just press the button on the battery to choose your favorite color & mode at any time. Comes with a rechargeable battery and a USB cable, Easily charge like your phone. USB charging for 1 hours will keep the light working for about 2-3 hours. LED battery is hidden inside the controller. Adjustable fitted Velcro strap closure, fits most head sizes, comfortable for wearing. You can scrub with a wet towel (Please do not knead and twist ). Keep the battery away from water. Hand wash ONLY, hang dry in ventilated place, please do not use a dryer or iron.