The silhouette of the round wheel weakens the sense of distance of the "musical instrument". The overall shape is small and portable, and can be easily put into a bag to accompany you, so that music is not limited by the scene. The ball knob on the top to adjust the volume has a vertical striping and anti-slip treatment on the surface to stabilize the control. The side atmosphere lamp flows with the light and shade of the performance, visualizing the emotion and making the music visible during each press.