Turn it on and magnetically attach Magnetune directly to your guitar’s tuning pegs or strap button and tune your instrument. Leave it on your guitar to easily tune while performing, attach it to your music stand, or just throw it in your pocket. Magnetune is the most straightforward guitar tuner ever. A movable ring allows the magnet to be rotated 360 degrees. This allows you attach the unit not only to left-handed guitars, but also to any metallic portion of your guitar, so you can tune with the conveniently at any angle.