Features:Comfortable fabric: Warm, comfortable and breathable fabric, so you can feel warm while wearing very comfortable.High brightness: 432 built-in high-powered, high-brightness light beads, so you can stand out in the crowd.BT Connect: You can enter any text content, you can choose different colors, effects and speed, and you can make it scroll a message left or right up to 40 characters.Easy to use: It's easy to connect to IOS, Android and other systems and it will scroll 22 different animations, or 20 different pictures.DIY editing: You can draw any pattern on the hat, light up the light beads, or change the background to any color and display it on the screen in real time; the saved pictures can be edited again.Music rhythm: Automatically scan music and play, you can choose different rhythm effect.Universal: This is an elastic knitted hat for men, women and children of all head shapes.Specification:Color: red\Black\grey(optional)Material: cottonNumber of beads: 432Light beads: 2121 RGB light beadsPixel point: 12 * 36USB charging: 5V\1ACharging time: 3 hoursUse time: 5 hoursBattery capacity: 700MAhInput characters: 40 EnglishSupport language: 10 kindsProduct weight: 124gPackage size: 20.6 * 11 * 3.8cmPackage weight: 171gPacking List:1 * Knitted Hat1 * Charging Cable1 * User Manual