The Ernie Ball FlexTune is a portable clip-on tuner suitable for guitar,  bass, and other stringed instruments. Featuring an oversized 2" LCD  screen, the FlexTune provides a large, vibrant display that is easy to  read from any angle. This is complemented by the tuner's dual-axis 360  degree pivot arm for complete flexibility to position the display to  your liking. The FlexTune also features Chromatic, Guitar, Bass,  Ukulele, and Violin tuning modes as well as selectable clip and  microphone sensors.