The Korg GT-120 seems to have gained a lot of attention it uses a needle style to show you when your guitar strings are in tune. It offers auto and manual tuning options when your in auto the string names will come up and be detected in manual you can choose the name of the note

It provides support for open flat tunings if your into alternative tunings, finger picking and slide guitar. It has five tunings.

It has a built in mic for acoustic guitars, reference pitch adjustable calibration and it used two AAA batteries

Overview of the Features

• Dedicated chromatic tuner for guitar and bass that supports seven-string guitars and six-string basses.
• Dual display combines a needle-type indicator with an easy to read backlit LCD screen.
• Choose from two tuning modes: Auto or Manual.
• Built-in reference tone plays in a 5 octave range.
• Flat Tunings: 1-4 in half-note steps.
• Five types of open tunings (D, E, G, A, DADGAD).
• Broad range of calibration adjustment (438Hz – 445Hz).
• Built-in mic for tuning acoustic guitars.
• Long battery life of more than 100 hours, plus a battery status indicator.
• Durable suede-type soft case is included.

Press Release

Dual display chromatic tuner also supports flat and open tuning, seven-string guitars and six-string basses.

Korg announces a new addition to its family of award winning tuners: the GT-120 Guitar/Bass Chromatic Tuner. Its dual display features a comprehensive backlit LCD screen and a highly accurate (+/- 1 cent) needle-type meter, plus two additional sharp/flat LED indicators. The smooth action VU-style meter and LEDs facilitate quick, accurate tuning, while the LCD displays the calibration setting, flat mode, note name and battery level.

In addition to Auto and Manual modes, the GT-120 supports five additional six-string guitar tunings (open E, A, D, G and DADGAD) and is ideal for tuning seven-string guitars and six-string basses. It also offers a flat tuning mode that can detect dropped pitches up to four semi-tones below standard pitch.
A built-in microphone is provided for tuning acoustic guitars and acoustic basses. An onboard reference tone oscillator can produce audible pitches from C2 to C7 for tuning by ear (also perfect for vocalists). The GT-120 also offers adjustable calibration in the range of 438-445 Hz (1 Hz increments) and the ability to detect pitches from A0-C8.

The Korg GT-120 is housed in a sleek black aluminum body with 1/4" input and output jacks. The tuner can operate for over 100 hours on two AAA batteries or can be powered by an optional AC adapter. A soft case is also included.

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