Seventeen light stick ver2-Seventeen light stick ver2-Seventeen light stick app for use. Register the ticket number through the app, you can enjoy a more enjoyable performance through a variety of directing in the venue. * Feature Guide 1. Register your ticket number If you register your seat number on the official cheerleader during the performance, the color will automatically change to match the stage production, allowing you to enjoy your performance more enjoyably. 2. Check the battery l