Housed in a tank-tough BOSS stompbox body, the TU-3 chromatic tuner 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 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 6 half-steps. It's the kind of instrument pedal tuner that no performing guitarist or bass player should be without.
Tuning Range: C0 (16.35Hz)-C8 (4186Hz)
Reference Pitch: A4=436-445 Hz (1Hz step)
Tuning Accuracy: 1 cent
Power Supply: DC 9 V: Dry battery 6F22 (9 V) type (carbon), Dry battery 6LR61 (9 V) type (alkaline), AC Adaptor (PSA series: optional)
Current Draw: 30 mA (DC 9 V), 85 mA (DC 9 V, when High Brightness mode is on)
Accessories: Owner's Manual, Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information"), Dry battery/9 V type (6F22)
Width: 73 mm, 2-7/8 inches
Depth: 129 mm, 5-1/8 inches
Height: 59 mm, 2-3/8 inches
Weight: 390 g, 14 oz.