Hohner 2504/40 Comet Harmonica

It has 2 rows of holes tuned exactly one octave apart. When both rows are played at the same time the effect is of 2 harmonicas playing simultaneously. This enables a single player to achieve a stronger, full-bodied sound not possible with a standard diatonic. Its curved body fits perfectly between your hands. Features moisture-proof synthetic combs, gold anodized covers, and 20 double holes.