New low price! The BOSS TU-80 brings super-accurate LCD tuning to a very affordable price, while adding unique features like a built-in metronome and Accu-Pitch™. The pocket-sized TU-80 runs on batteries and can tune almost any instrument, thanks to a chromatic tuning mode. It even tunes 7-string guitars and 6-string basses—putting the TU-80 in a class all its own.