TU-88 (Black)

TU-88 Guitar Tuner

TU-88 (Black): TU-88 Guitar Tuner

Triple-Function Monitor/Tuner for Guitar and Bass


Small, cool and feature-packed, Boss’ new TU-88 is a must-have for guitar and bass players on the go. Available in black or white, it provides needle-accurate tuning, a metronome, and a headphone amp with speaker simulator for monitoring effects, including compact pedals.

  • Three tuning modes (Chromatic, Guitar, Bass), Flat Tuning function and ACCU-PITCH verification with an audible beep
  • Built-in headphone amp lets you tune, jam and play your effects with headphones or direct recording
  • Built-in metronome with selectable rhythmic patterns and volume control
  • MIX IN allows jamming with an external music-playback device (iPod, etc.)


Tuning Range
E0 (20.6 Hz) - C8 (4,186.0 Hz)
Reference Pitch
A4 (435- 446 Hz)
Tuning Accuracy
± 1 cent
Power Supply
Dry battery 6F22/6LR61 (9 V) type, AC adaptor DC 9V (PSA series; optional)
Current Draw
30 mA
Expected battery life under continuous use (carbon)
Approximately 8 hours
*This figure will vary depending on the actual conditions of use.
Dry battery 6F22 (9 V) type (carbon), Owner’s Manual, Leaflet (“USING THE UNIT SAFELY” and “IMPORTANT NOTES”), Information
Size and Weight ( including battery )
140 mm
5-9/16 inches
80 mm
3-3/16 inches
30 mm
1-3/16 inches
0.2 kg
0 lbs. 7 oz.
*The specifications are subject to change without notice.


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Support Documents