Boss TU-3 Chromatic Tuner. Made in Taiwan.

Pedal Tuner with smooth 21-segment LED meter and versatile modes in tank-tough Boss body, with power supply capability.


  • 21-segment LED meter with brightness control
  • High-Brightness mode enhances meter visibility outdoors
  • Accurate to +/- one cent
  • Accu-Pitch Sign function provides visual verification when tuning is complete
  • Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)
  • Flat tuning is supported with Guitar Flat mode, which allows for “drop” tunings up to six semitones below standard pitch
  • Tuner automatically mutes signal when the tuner is on
  • Can be used to daisy chain power to other pedals.
  • Supplies power for up to seven BOSS compact effect pedals

Boss TU-3 Chromatic Tuner

SKU: bosstu3