Product Description The new world-standard tuner has arrived the worlds top-selling stage tuner, the BOSS T-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 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 Ace-Pitch sign function. The TU-3 incorporates a convenient note name indicator that can display notes of string guitars and string basses, while the flat-tuning mode can support up to six half-steps. Its the new-standard tuner that no guitarist or bass player should be without! . From the Manufacturer TU-3 Chromatic Tuner Bringing the legendary stomp pedal quality and ruggedness to the tuner world. The worlds 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. 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 when the tuner is on