Easy to operate: The LED hat is simple to use. Download the XiaoBai LED app from the App Store or scan the QR code in the user manual. To activate the LED screen, press and hold the power key. Adjustable size for a secure fit: The hat features a practical adjustable strap at the back, allowing you to the size of the hat to fit your head comfortably. This design accommodates various head sizes for lasting comfort during any activity. Removable LED screen for versatility: The LED screen is detachable, giving you flexible use options. If you don't want to display text, turn off the power and wear the hat as a regular cap. Fixed LED display with visibility: The hat uses a 12x32 point LED color matrix. The displayed content is fixed and cannot be edited through the mobile app, making it suitable for outdoor concerts, baseball games, festivals, Xmas events, parties in bars and clubs, and more. Use scenarios: Outdoor concerts and festivals where eyecatching text or graphics can enhance performance or attendance. Baseball games or sports events to display scores, names, or cheering messages. Bar or club nights and parties where fixed graphics add to the ambiance.