Roadie Automatic Guitar Tuner RD100 Roadie Tuner Automatic Guitar Tuner Connect Roadie to the peg of your instrument, strum the string and watch it tune in seconds 8 pre-set alternate tunings for guitars and ability to create custom tuning. - Customize your guitar strings in 1 cents increment Built-in string winder functionality Tunes 6-7-12 string guitars, ukulele, banjo with standard guitar pegs Plug-in your electric guitar to the app using the accompanying adaptor and tune in noisy environments