The Planet Waves Chordmaster/Tuner/Metronome features over 7,000 chords in the comprehensive chord library. All are instantly accessible when required, viewable on a conveniently back-lit LCD display. In addition, the CTM offers a precision chromatic tuner, taking the guesswork out of tuning when rehearsing or performing. If that weren't enough, the CTM houses a full-featured metronome for private practice or for counting off tempos.