Boss TU-30 - tuner (tuner) with metronome, is the essential tool for every musician or music teacher, always at hand, being ideal for practice and tuning the instrument. It offers the same features as the TU-80, but in a much more compact form. Includes Accu-Pitch, various tuning types and accompaniment rhythm types, metronome. Provides tuning capability through the built-in microphone or via a cable input from the instrument.