Mini harmonica made by Showa Gakki. The box, strap, instruction manual, and scale chart were not included when I received it. Approximately 3.5cm wide, 1.5cm long, and 1cm thick (at the bottom). I don't know much about harmonicas, and I haven't tried playing it. However, according to the official website, it can produce 8 notes over one octave, and it seems to be a musical instrument that can actually be played. I hope you find a good match. #Halloween on Mercari