For the lazy/tin-eared guitar players

[Bob Dole]

Thanks to Gibson's Powertune system, now even tin-eared guitarists can push a button, strum the guitar a few times, and then it's as if a ghost has taken over the machine, turning the tuning pegs until the guitar is accurately tuned. It tunes each string to within .02 cent, which is pretty damn close to perfection. It can tune to the default A440, or it can tune the strings to pitches that are relative to a note of your choice. You can also store a variety of tunings and quickly call them up. Hey, this could really be useful.

Complete story and video