The Tombo Tremolo 3121 is a 42-reed, 21-note tremolo harmonica. However, it’s worth noting that Tombo also makes Tremolos with more or fewer reeds and notes. Each one has a plastic comb and is available in multiple keys. The Tremolo 3121 covers 3 octaves. It has extremely accurate and responsive reeds, which give it a nice sound. However, there are other models with richer sounds, such as the Suzuki Humming Tremolo. Nevertheless, the Tombo Tremolo 3121 offers a consistently good sound, unlike some other models that can be unpredictable. So, it is both an easy tremolo to learn on and a reliable instrument for serious professionals.
Sound quality is not as good as some other harps, but is decent for the money