Diatonic Tremolo Harmonica with 2 x 20 holes in C. This harmonica fits your pocket, but has a big tonal range. It covers 3 octaves, enough for more than mouthful of fun. The easy pieces accommodate only two chords (Tonic and Dominant chords). With the diatonic tone layout a lot of popular melodies are playable. (Picture is the Sailor 48)