Tuning a guitar just got a thousand times easier, even in a loud environment! Simply place Roadie on the tuning peg, pluck the string and watch Roadie automatically get your guitar into perfect tune. Roadie 2 uses a vibration sensor to deliver accurate tuning every time. It works on all string instruments with a guitar machine head including electric, acoustic, classical, steel, 7 and 12-string guitars, ukuleles, mandolins, banjos and more. Tune to standard, switch between 40+ preset alternate tunings or even create & save your own custom tunings. Roadie 2 also comes with a built-in wind/unwind feature for easy restringing.