BeMyGuest OFFICIAL LIGHT STICK is an application designed to work with the original penlight of "Be My Guest - Takanori Iwata." It offers various features to enhance the concert experience. With a focus on Bluetooth connectivity, users can synchronize the penlight with performance data for dynamic effects during concerts. Additionally, users can change the penlight color by selecting their desired color on the smartphone screen.

One of the key features is the Concert Mode, where users can enjoy a variety of effects using the original penlight through Bluetooth connectivity. The app also includes Bluetooth pairing functionality, allowing the penlight to sync with the smartphone. Moreover, the Self Mode enables users to select the penlight color via the smartphone screen, providing customization options.