9 Loudspeakers; loudspeaker housings; loudspeaker systems; personal speakers; portable speakers; karaoke speakers; wireless speakers; apparatus for the recording, transmission, amplification and reproduction of sound
15 Musical instruments; music stands and stands for musical instruments; conductors' batons; organs (musical instruments);pianos; keys for musical instruments; synthesizer (musical instruments); bow musical instruments; wind musical instruments; stringed musical instruments; percussion musical instruments; electronic percussion instruments; strings for piano and bow musical instruments
The English translation of SENSEI in the mark is "teacher" or "mentor".