BOSS TU-3 Guitar Tuner Pedal Features at a Glance:

• 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