Boss TU-3 Chromatic Tuner Bundle with Power Supply, Instrument Cable, Patch Cable, Picks, and Austin Bazaar Polishing Cloth 21-segment LED meter with brightness control High-Brightness mode enhances meter visibility outdoors Accurate to +/- one cent Accu-Pitch Sign function provides visual verification when tuning is complete Chromatic and Guitar/Bass mode (tune by string number, with support for 7-string guitars and 6-string basses)