Swan 2-In-1 Dual-Sided Tremolo Harmonica Mouth Organ With 24 Double Holes In A Double-sided tonality mark, one piano for two purposes: one side is C-tone and one side is G-tone, buying one is equal to having two, double-row sound holes, using phosphor bronze reeds, good resonance effect, full tone. Special cover plate 18 round hole design: using stainless steel thick cover plate, high hardness, double plating process, anti-rust, bright and more temperament, 18 hole design, making the sound more penetrating. Resin piano with good air tightness: black resin piano can be used for a long time without absorbing moisture, durable, safer to use, long-term use of multi-point support will not loosen. Structure is stable Phosphor bronze tone spring: adopt brass thickened copper seat plate, the structure is stronger and the air tightness is improved. The sound is clear and crisp, and the performance is more outstanding. Portable storage box: small and stylish, easy to store, dust-proof, convenient to carry around, and effectively protect the harmonica.