Easy to use Download the mobile app, long press the power button to activate the LED screen, and connect to your phone hotspot. In the app you can input text or create your own display to attract attention. Programmable LED cap 16x32 dot array color LED. The content on the LED screen can be edited through the mobile app. It is suitable for outdoor concerts, baseball, bars, clubs, holiday parties, and more. Size adjustment The back of the hat has a practical adjustment buckle to change the tightness to fit your head circumference and accommodate most users. Cotton material Made from cotton fabric for comfortable wear. The thickened design resists deformation or collapse and doesn't affect the hat's appearance. Ideal uses Outdoor concerts and sports events where visible messaging helps draw attention Bars, clubs, and holiday parties for enhanced visibility in low light Fests and social gatherings where text or graphics can engage audiences Key attributes Function: programmable LED display controlled via mobile app Compatibility: controlled through a mobile app and phone hotspot connection Size: adjustable back buckle to fit most head sizes Material: cotton fabric for comfort and durability Performance: 16x32 dot color LED array for clear, bright display in various environments