B-Stock, IK Multimedia iRig Pro Quattro I/O Deluxe; 4 In / 2 Out USB audio/midi interface; AD/DA converter: 24 bit/96 kHz; 4 ultra-low noise mic preamps with 48V phantom power; standalone mode; built-in limiter for input 1-2 to protect against clipping; safety channel with -12dB level cut; internal multitrack, stereo or mono mixdown; 2 combo mic/hi-Z instrument inputs; 2 combo mic preamps/balanced line inputs; stereo RCA and 3.5mm line input; outputs: 2x XLR and 3.5mm line output; built-in MEMS microphone; MIDI input and output; 2 x iRig MIC XY stereo microphones; power supply via connected device, external power adapter (not included), or 2 AA batteries; charging function for connected device; system requirements: MAC (OS 10.6 or higher), PC (XP, Vista, Windows 7,8,10), compatible with most iOS devices iOS 6 and higher, Android compatible (Android 5 and higher, for devices with USB digital audio support); incl. iRig MIC XY windscreen, carrying case, 9V power supply, Lightning-, USB-C and USB-A cable, adapter from 2.5 mm jack to MIDI jack and 4 AA batteries; Dimensions: 166 x 92 x 43 mm; Weight: 0.33 kg, B-Stock with full warranty, may have slight traces of use