The world s top-selling stage tuner, the BOSS TU-2, evolves and improves with the debut of the new TU-3. Housed in a tank-tough BOSS stompbox body, the TU-3 features a smooth 21-segment LED meter with a High-Brightness mode that cuts through the harshest outdoor glare. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy visual pinpoint tuning verification with the Accu-Pitch Sign function. The TU-3 incorporates a convenient Note Name Indicator that can display notes of 7-string guitars and 6-string basses, while the Flat-Tuning mode can support up to six half-steps. It s the new-standard tuner that no guitarist or bass player should be without! * 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 six semitones below standard pitch * Signal is automatically muted when the tuner is on * Supplies power for up to 7 BOSS compact effect pedals