Reloop Play USB DJ Audio Interface, 24-Bit Sound Quality, Black (PLAY) Ultra portable 4-channel DJ audio interface with 24 bit resolution Hi-speed USB 2.0 with low latency ASIO/CORE Audio drivers Hi-gain outputs for powerful club sound 2 stereo RCA outputs for use with an external DJ mixer Compatible with Mac OS X and Windows XP/Vista/7 Ultra portable DJ soundcard: 4x4 Out audio interface with professional 24 bit/96 kHz sound quality Hi-speed USB 2.0 with low latency ASIO/CORE audio drivers 2x stereo out (RCA), 1x stereo headphones connection 6.3 mm jack 2 play modes: External mixer mode (2 separate channels can be routed to an external mixer), Controller mode (1x master out is routed to the sound system and headphones can be connected directly to the interface) Separate volume controllers for channels 1 & 2, master & headphones respectively; Bus powered: No mains adapter required