This application is compatible with using J-JUNs official penlight.[Information on main functions]1. Streaming concert modeBy linking the penlight with the production data using the Bluetooth function, you can enjoy various productions of the penlight during a streaming concert. This menu can only be used during concerts.2. Bluetooth connectionPress and hold the penlight button for 3 seconds to switch to "Bluetooth mode".When you turn on the "Bluetooth mode" of the smartphone and bring the penlight closer, the penlight and the smartphone will work together.3. Self modeSelect the desired color on the penlight and smartphone screen to change the color of the penlight.4. Check the battery levelYou can check the battery level of the penlight by tapping the "Check battery status" button at the bottom of the screen in the "Self mode" state. Check if the battery needs to be replaced.* The displayed remaining capacity may differ from the actual remaining capacity depending on the battery performance and smartphone model.[Notes before viewing the concert]--Check the battery before the performance so that the wireless control light does not turn off during the performance, and if the battery capacity is low, replace it with a new battery.[Information on required access authority]To use the service, you need access authority for the following items.* When the pop-up screen is displayed, click the "Allow" button.--Bluetooth: For penlight connection--Location: For Bluetooth connection