Serato Pitch 'n Time DJ Expansion Pack This is an expansion pack for professional DJs that allows you to change the key and tempo of tracks with perfect audio quality. Ideal for harmonic mixing and seamless mixes across genres. Brand: Serato Product Name: Pitch 'n Time DJ Type: Expansion Pack Function: Track key/tempo change (high-quality processing) Uses: Harmonic mixing, remix production, etc. *Currently, it is not sold separately, making it a hard-to-find item. Recommended for those who want to expand their DJing capabilities.