I purchased this and have stored it at home. Please be aware of this and only purchase if you are okay with it. The key is F. TOMBO (Tombow) 1710 MAJOR BOY 10Hole Major Boy 10-hole harmonica Since its release, the Major Boy has been a standard 10-hole harmonica and has remained at the top. It is loved across genres and generations, including blues, folk, pop, rock, and country-western. Many artists use it, such as Yuzu, Kobukuro, Tsuyoshi Nagabuchi, and Masayoshi Yamazaki. The quality of durability, ease of playing, and ease of maintenance are all highly praised by artists worldwide, and its track record speaks to the excellence of this model. Blues harp.