Korg OT120 Orchestral Tuner - dif. tuning modes (Chromatisch, Skala :12 Notes, Pythagoreisch,Mittelton Es/Dis, Werckmeister III, Kirnberger III, Kellner,Vallotti, Young), , big display, A0-C8 detection range, C2-C7 reference note, A=349-499Hz, easy operation, power supply not included