The NewJeans OFFICIAL LIGHT STICK is a free Android app developed by HYBE Co. Ltd. that offers a unique concert experience. With smartphone Bluetooth connectivity, users can activate the Power & Bluetooth function by pressing two buttons for 2 seconds. Once activated, the app enables users to enjoy various stage effects during a concert via the Concert mode. Before the concert, users can enter their ticket information and pair their light stick to enable this feature. The app also features a Self mode that allows users to change the LED lighting color by selecting their preferred color.

It is essential to check the battery level before the show to ensure that the light stick does not shut off during the concert. Users must also enjoy the show from the same seat registered on their light stick, or it may interfere with the proper operation of the "NewJeans Official Light Stick Wireless Control" feature. If users face difficulties entering their seat information, they can seek help from the support staff at the venue. Overall, the NewJeans OFFICIAL LIGHT STICK app provides a unique way to enhance the concert experience with its Bluetooth connectivity and various stage effects.