The GA Custom features a large 3D visual meter, the first of its kind for a compact tuner. Three-dimensional lights and versatile display modes deliver an unprecedented level of visibility, for easy tuning in any environment. With its ultra-high 0.1 cent tuning precision, the GA Custom is KORG's most accurate handheld tuner to date! The flat body with rubberized exterior is even more compact and portable than ever. A high-sensitivity mic is built-in, allowing it to be used not only with guitar/bass but also with orchestral and acoustic instruments. The GA Custom represents the next generation of compact tuners and packs a ton of high-end functionality into a convenient and highly portable and convenient package.