Suzuki SU-21-C 2 Timer Tremolo Traditional 21-Hole Dual Note Diatonic Harmonica, Key of C Key of C - 21 Hole For the sound of yesterday from the technology of today, the new Suzuki 2 Timers are sure to bring back memories 2 Timers have a traditional sound quality made possible by a dual hole octave/tremolo tuning action, excellent for folk and country style playing Laser tuned reeds are extra lightweight to give that special harmonica octave effect Includes a soft lined hard shell case