Eliminate the guesswork!
The String Master Tunermatic Robotic Guitar Tuner is incredibly easy to use. Simply plug your guitar into the input jack, pluck the string a few times, and watch in amazement as String Master's powerful motor tunes the string to perfect pitch.
The Tunermatic Robotic Guitar Tuner works with any pickup-equipped 6-string. Adapter required for acoustic guitars. Can also be used to wind and unwind strings with the push of a button. With the String Master Tunermatic you get incredible tuning accuracy automatically.