Ernie Ball ProTune USB-C Rechargeable Clip-On Tuner

The Ernie Ball ProTune is a rechargeable clip-on tuner that attaches to an instrument's headstock and shows pitch on a high-visibility color display. It offers five tuning modes - chromatic, guitar, bass, violin, and ukulele - with a rated accuracy of plus or minus 0.1 cents. It charges over USB-C for up to about 10 hours of use, and the clip head swivels 360 degrees for easy viewing.