Harmonetta
The Hohner Harmonetta is a mouth-blown free-reed instrument which was introduced by Hohner in the 1950s. It has an approximately 3-octave range, from C3 to B5.
The Harmonetta combines features of the harmonica and the melodica. It has a keyboard of 32 hexagonal buttons laid out according to the harmonic table, each labeled with one of the 12 pitch classes. The buttons are labelled in German, thus the letter "h" is used where English speakers would use "b", and the letter "b" is used where an English speaker would use "Bb". Depressing a key makes it possible to play all notes of that pitch class; which octave sounds depends on where the mouth is positioned on the mouthpiece. The instrument is unisonoric, meaning that the same note is played on both blowing and drawing. Hohner discontinued the Harmonetta in the 1970s.
