alavisxf xx LED Cap, Detachable LED Display Screen Smart Hat Adjustable Cool LED Baseball Cap for Party Christmas Halloween(Blue Light)

Controlled by APP – This smart hat controlled by APP (Named “Magic Display” ). You can download the APP by scan the QR code on the manual instruction, or search it on your APP store. IOS users can download normally, Android users please test your phone could download the APP or not (only could be download in Google Play Store) before you purchase.
Easy to Use- First download the APP(Named “Magic Display”). Second, turn on your Bluetooth and connect with the app, when the led display is starting to flicker means it connect successfully. Third, go to the app and choose the pattern and click OK, then it will show on the Led screen.
Detachable Led Screen- If you do not want your hat show the words, you can turn off the power and use it as a normal hat. You can also remove the Led screen, and use it to other place. The hat is adjustable by snap on, and the head circumference is 22-23 inches (56-59 cm).