BOSS TU-3 Guitar Tuner Pedal Features:
- Stompbox-style guitar tuner pedal
- 21-segment LED meter with brightness control
- High-brightness mode enhances meter visibility outdoors
- 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 6 semitones below standard pitch
- Tuner automatically mutes when the tuner is on
- Can supply power for up to 7 BOSS compact effect pedals