TXT Official Light Stick Ver.2 is the official mobile app designed for fans of the band TXT to enhance their concert experience. The app offers a range of features to interact with the band's official light stick. Users can easily connect their light stick via Bluetooth to their smartphone for personalized control of LED lighting colors. Additionally, the app provides a unique Concert mode where users can sync their light stick with concert ticket information to enjoy special stage effects during the show.

For TXT fans, the app serves as a crucial tool to ensure a seamless concert experience by allowing users to register their ticket information on the light stick beforehand. It emphasizes the importance of maintaining the same seat during the show to avoid any disruptions in using the light stick's wireless control feature.