A rational modular audio series that shares sounds and design. The multi-layer grille of the main speaker offers powerful sound and the IPX7 waterproof feature of outdoor products with a combination of metal and mesh jersey. Automatic non-contact charging is possible by placing the main speaker over the woofer modules. When charging is complete, the 360º sound of its audio is emphasized while the speaker with the three-dimensional pattern grille is levitating and rotating. The radio module provides rational use scenes to enjoy both radio and music in one product, whereas the lantern module provides the music and atmosphere with outdoor lantern and mood light.