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The Boss TU-12EX is the professional musicians' first choice compact tuner. Designed to be able to tune all types of guitar and bass (and other instruments too via the built in microphone). A highly accurate needle display and clear, easy operation come as standard with Boss tuners - all in a feature packed unit that will fit in your pocket.

Chromatic Tuner for Guitar & Bass

This successor to the legendary TU-12 provides BOSS' famous needle/LED indicators for fast, accurate tuning. Other features include Flat Tuning of up to six half steps, ACCU-PITCH with an audible beep, a reference tone, a built-in microphone for acoustic instruments and battery-saving Auto-Off.

Tuning Range
E0 (20.6 Hz)- C8 (4,186.0 Hz)

Reference Pitch
A4 (438- 445 Hz)

Tuning Accuracy
± 1 cent

Power Supply
Dry battery R03 (carbon) or LR03 (alkaline); (AAA) type x 2; DC 3 V, AC adaptor DC 9V (PSA series; optional)

Current Draw
12 mA

Expected battery life under continuous use (carbon)
Approximately 15 hours
*This figure will vary depending on the actual conditions of use.

Dry battery (R03 (AAA) type) x 2 (carbon), Owner's Manual, Soft Case, Leaflet (“USING THE UNIT SAFELY” and “IMPORTANT NOTES”)

148 mm
5-13/16 inches

54 mm
2-1/8 inches

24 mm
1 inches

0.1 kg
0 lbs. 5 oz

    Anonymous review via Feefo | Purchase date: 17 May 2015

    I've never owned a Boss product that wasn't brilliant.

    Chester | Purchase date: 24 March 2012

    Best tuner on the market. Precise and easy to use. Good for quick tuning and intonation. Recommended for beginners and expirenced musicians.

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Part Number: TU12EX