Boss TU-30 Tuner And MetronomeThe Boss TU 30 is a combined tuner and metronome sporting an on board mic and a 1 4" input jack for guitars and basses. The TU 30 features multiple tuning modes for measuring pitch, as well as multiple rhythmic patterns for improving your groove whilst practicing. Its tuner features an accuracy of 1 cent, while its metronome can demarcate between zero and nine beats per measure. Notable Features Supports chromatic tuning, guitars, basses, and flat