Features 1、APP EDITABLE: 12x36 dot LED color matrix, the contents of this hat LED screen can be freely edited via a mobile APP, wonderful for outdoor concerts, baseball, Mardi Gras, Xmas, bars, clubs, holiday parties, All Hallows Day 2、DETACHABLE SCREEN: If you don't want the hat to display text, you can turn off the power and use as a regular hat. The LED screen can be removed for use elsewhere 3、ADJUSTABLE SIZE: The LED cap has a reasonable adjustment buckle at the back. You can adjust according to the size of your head. Don't worry about the hat being too big 4、COTTON MATERIAL: This LED smart cap is made of cotton fabric and is comfortable to wear. The top is thickened, not easy to deform or collapse, and will not affect the appearance of the hat 5、EASY TO USE: Download the for Shining Classes APP or scan the QR code in the user manual, long press the power button to activate the LED screen and connect to the phone Bluetooth hotspot. In the APP, you can enter text or create your own doodle style for your LED cap to grab everyone attention Specification Item Type: LED Hat Battery: 1 x 700mAh 902040 polymer lithium battery Charging Time: 3 Hours Usage Time: 5 Hours Pixels: 12x36 Pixels APP: For Shining Classes Communication Method: Bluetooth mobile APP(support for iOS and for Android) Package List 1 x Hat 1 x USB Cable 1 x User Manual