Marshall Rock Box The Marshall Rockbox Guitar Amp Package delivers everything you want from Marshall when you're just starting out. Plus, the MG15DFX amp included in the package is so incredible, even seasoned players will love this deal! The Rockbox also includes: Features: Instructional Rock Guitar Tutorial DVD Chromatic Digital Tuner: An excellent tuner with a built-in mic, tone generation capabilities (so you can tune to its pitch, like a tuning fork) and flat tuning (x5!). Gig Bag Guitar Cable Guitar Strap String Winder Set of Strings (.009 - .042) Bag of Picks