The String Master Robotic Guitar Tuner is unlike any guitar tuner you’ve ever used. The Robotic technology makes it very easy and fun to tune a guitar. All you do is hold the String Master robotic guitar tuner on each tuning peg and pluck the string. String Master listens to the sound and its powerful gear motor actually turns the peg for you until that string is tuned to perfect pitch. The String Master robotic guitar tuner uses advanced microprocessor technology to sample the sound several times, eliminating harmonics and overtones. Available for $ 49.95 at Hotguitarist via – Xataka.