Ernie Ball Flextune Clip-On Tuner Black Chromatic, Guitar, Bass, Ukulele and Violin tuning modes 2 in. Large vibrant LCD display Selectable sensor modes: mic or clip vibration Precise pitch calibration Dual axis 360 degrees pivot arm provides unmatched adjustability Powered by 3-volt lithium battery The Ernie Ball Flex Tune is a portable clip-on tuner suitable for guitar, bass, and other stringed instruments Featuring an oversized 2 in LCD screen, the Flex Tune provides a large vibrant display that is easy to read from any angle This is complemented by the tuners dual-axis 360 degree pivot arm for complete flexibility to position the display to your liking