BOSS TU-02 Clip-On Tuner

Get a Bright Color Display with Adjustable Viewing Angle - the Boss TU-02 Clip-On Tuner

With a bright color display, swivel adjustment, and four selectable modes, the versatile TU-02 offers reliable tuning for guitar, bass, ukulele, and other stringed instruments.

• Compact and accurate clip-on tuner with high-contrast color display
• Four tuning modes: chromatic, guitar, bass, and ukulele
• Up to 24 hours of continuous runtime with CR2032 lithium battery
• Auto power off feature conserves battery life when not in use

Secure and Reliable

The TU-02's high-contrast color display provides accurate, easy-to-view tuning everywhere you play. The rugged, padded clip securely grips to your instrument's headstock, while swivel adjustment lets you position the display for the optimum viewing angle. A single CR2032 lithium battery provides continuous runtime up to 24 hours, and an auto power off feature conserves battery life when the tuner is idle.

Works with Guitar, Bass, Ukulele and More

With its versatile modes and quick-change design, you can tune a variety of instruments with the TU-02. Choose from standard tuning modes for guitar, 4- and 5-string bass, and ukulele, or chromatic mode for alternate tunings and other stringed instruments. Flat tuning over a range of two semitones down is supported, perfect for players who like to tune low for a heavier sound. And with adjustable calibration from 430 to 450 Hz, you can set the tuner to a reference other than the default 440 Hz standard if needed.

SPECIFICATIONS

Tuning Range

• A0 (27.5 Hz) -- C8 (4,186.0 Hz)

Reference Pitch

• A4 (430 -- 450 Hz)

Tuning Accuracy

• +/- 1 cent

Tuning Mode

• CHROMATIC / GUITAR / BASS / UKULELE
• Flat Tuning: Regular -- 2 semitone lower

Controls

• POWER/M (mode) button
• A4 button
• Flat button

Display

• Backlit color LCD

Power Supply

• CR2032 lithium battery x 1

Current Draw

• 7.5 mA

Expected Battery Life Under Continuous Use

• Approx. 24 hours (figures will vary depending on the actual conditions of use)

Auto Off Function

• Approx. 5 minutes

Dimensions

• 28 (W) x 38 (D) x 50 (H) mm
• 1-1/8 (W) x 1-1/2 (D) x 2 (H) inches

Weight (including battery)

• 25 g
• 1 oz

Accessories

• Owner's manual
• CR2032 lithium battery

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.