Native Instruments Traktor Kontrol S4 Highly integrated 4-deck TRAKTOR controller and flagship software Hardware: 4-channel mixer with ergonomic layout, 2 high-res touch-sensitive jog wheels Software: TRAKTOR PRO 2.5 - features 4-deck mixing and effects, plus all-new Sample Decks and a powerful Loop Recorder Built-in high-end 24-bit/96kHz low-latency audio interface with Cirrus Logic AD/DA converters and MIDI I/O Powerful MP3 management with iTunes integration and iPod compatibility