Denon DJ A- B Box (DS1) Premium Digital Vinyl System (DVS) interface for Serato DJ Pro Interfaces turntables and CD players using Serato Noise Map with a Serato DJ-based digital music library Plug and play with Serato DJ Pro and Serato DVS Expansion Pack-no purchase necessary (2) sets of stereo RCA inputs and outputs for left and right decks Studio-grade 24-bit digital to analog conversion