Mixars Quattro, the older brother to the popular Mixars Duo. The Quattro is a professional 4-channel mixer for a forthcoming release of Serato. The Mixars Quattro is Serato DJ and DVS enabled with dual USB audio connection, 16 RGB control pads, and effects selection. The Quattro is a full-feature mixer made to conquer the club scene with superior audio quality completely integrated with the world-renowned software, Serato DJ. This mixer achieves the best high-quality audio output, ensuring superb sound quality in a club, in a small venue or at home. The dual USB ports lets hook up two laptops for easy changeover.