The Snark Air is one value-packed little tuner! Of course, it tunes guitars and basses, but you can also use it with ukuleles, banjos, mandolins, and more. Courtesy of its bright, colorful LED display, you ll always know when your pitch is flat (magenta), sharp (orange), or on target (green). Placing the Snark Air behind your headstock and double tapping the airplane logo reorients the display, letting you discretely tune during gigs. You ll never need to replace batteries either, thanks to the Snark Air s micro-USB charging capabilities.