The Serato Tool Kit contains Serato Flip, Pitch 'n Time DJ and the FX Kit. The Serato FX Kit comes with all Serato FX expansion packs, including the Wolf, Chip, Jet and Back Packs. Serato DJ Pitch 'n Time DJ Expansion Pack lets you speed up or slow down your track to extreme tempo values while maintaining its key perfectly, with no artifacts. Serato DJ Flip Expansion pack lets you create custom edits, extend and re-imagine your music. Create and save up to 6 Flips per track. Mix with your keyboard, cue tracks in your headphones—no other hardware required.