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One of the world's top-selling stage tuners, the BOSS TU-2, has evolved and improved into the TU-3 chromatic tuner pedal. 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. Accu-Pitch Sign gives you pinpoint visual verification that tuning is complete. The BOSS TU-3 chromatic tuner 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 kind of instrument pedal tuner that no performing 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 6 semitones below standard pitch 
• Signal is automatically muted when the tuner is on 
• Supplies power for up to seven BOSS compact effect pedals (with optional PCS-20A cable, sold separately)
• Accessories:

• Owner's Manual 
• Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information") 
• Dry battery/9V type (6F22)

• Tuning Range: C0 (16.35Hz) -C8 (4,186Hz) 
• Reference Pitch: A4=436-445Hz (1Hz step) 
• Tuning Accuracy: ±1 cent 
• Power Supply: DC 9V: Dry battery 6F22 (9V) type (carbon), Dry battery 6LR61 (9V) type (alkaline), AC Adaptor 
• Current Draw: 30 mA (DC 9V), 85mA (DC 9V, when High Brightness mode is on)
• Dimensions

• Width: 2-7/8" 
• Depth: 5-1/8" 
• Height: 2-3/8" 
• Weight: 14 oz.