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 a 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. Korg GACS Custom Guitar and Bass Tuner features: 3D visual meter with revolutionary visual effects Ultra-high tuning accuracy of +/- 0.1 cents Three meter display modes Compact flat design provides a large screen and easy portability A high-sensitivity mic is built-in allowing use with acoustic & orchestral instruments