Own an original! The Xaphoon "Signature Series" are bamboo instruments personally selected and hand-crafted by the instrument's inventor, Brian Wittman. This "C" instrument, like all the other models, has a complete 2-octave range, including all sharps and flats. Each "Signature Series" instrument is hand-signed, individually numbered, and comes with a signed Certificate of Authenticity. A must-have for true Xaphoon aficionados and collectors!