Boss TU3 Pedal Tuner

Precise Tuning In Seconds
Housed in a really tough BOSS stompbox body and featuring a smooth 21-segment LED meter with a High-Brightness mode, the Boss TU-3 cuts through the brightest lighting conditions. Choose between Chromatic or Guitar/Bass tuning modes, and enjoy improved visual pinpoint tuning verification with the Accu-Pitch Sign function. The Boss TU3 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.

Included Accessories:
Owner’s Manual
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
Dry battery/9 V type (6F22)
Features
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
Tuner automatically mutes when the tuner is on
Supplies power for up to 7 BOSS compact effect pedals
Specifications
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)
Dimensions:
Width: 73 mm2-7/8 inches
Depth: 129 mm5-1/8 inches
Height: 59 mm2-3/8 inches