Guitar tuner that magnetically attaches directly to the guitar’s tuning pegs or strap button, or to the music stand. A movable ring allows the magnet to be rotated 360 degrees. This allows user to attach the unit not only to left-handed guitars, but also to any metallic portion of the guitar for convenient tuning at any angle. An LED indicates the string number that is closest to the string which is played, providing an instant information about which string is being tuned. Once the precise pitch, the upper and lower LEDs will both illuminate. The upper LED blinks the tuning is sharp, and the lower LED blinks if it flat. The LED will blink more rapidly as the string gets farther from the correct pitch, and will slow down as the correct pitch is approached. The tuner is powered by one CR2032 lithium battery (included). Dimensions: 33 x 35 x 13 mm. Weight: 11 g.