The String Master 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 Robotic Guitar Tuner works with any pickup-equipped 6-string. Adapter required for acoustics. Can also be used to wind and unwind with the push of a button. With String Master you get incredible accuracy easily..
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