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TU-01: Clip-On Chromatic Tuner

Compact and Easy-to-Use Clip-On


Ideal for guitar, bass, and ukulele, the clip-on TU-01 is the most affordable tuner in the trusted BOSS lineup. Small, durable, and simple to use, it provides convenient, reliable tuning right on your instrument’s headstock. A bright, attractive display features a cool digital meter and note indicator, plus two lights that show when you’re perfectly in tune. The TU-01 also adjusts for different viewing angles and folds down for easy transport in your case or gig bag.

  • Renowned BOSS tuning quality in an affordable clip-on tuner
  • Features Chromatic, Guitar, Bass, and Ukulele tuning modes
  • Convenient reference pitch function (A=440 Hz)
  • Runs for up to 25 continuous hours with a CR2032 lithium battery
  • Auto off function to preserve battery life when the tuner is not in use

Compact and Easy-to-Use Clip-On


Tuning Range
A0 (27.5 Hz)--C8 (4,186.0 Hz)
Reference Pitch
A4 (440 Hz only)
Tuning Accuracy
+/- 1 cent
Tuning Mode
Power switch / Mode switch
backlit LCD
Power Supply
CR2032 lithium battery x 1
Current Draw
6 mA
Expected battery life under continuous use
Approx. 25 hours
* These figures will vary depending on the actual conditions of use.
Auto off function
Approx. 7 minutes
Owner's manual
CR2032 lithium battery
Size and Weight
56 mm
2-1/4 inches
31 mm
1-1/4 inches
32 mm
1-5/6 inches
Weight (including battery)
30 g
2 oz


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