Used approximeantly 3 months,

2 front-panel mic/line inputs complete with phantom power for condenser microphones, inserts for outboard effects, balanced and unbalanced analog outputs, S/PDIF digital I/O, MIDI I/O, and more. The Fast Track Pro also features near-zero latency direct hardware monitoring and low-latency ASIO software monitoring, plus an A/B source switch and dual output pairs for DJ-style cueing. Compatible with most popular PC and Mac music software. USB connection and bus power along with class compliancy for Mac OS X* make it a breeze to set up.
1/4", RCA, XLR, and MIDI inputs.
24-bit/96kHz audio interface
2 front panel mic/instrument preamp inputs (Neutrik XLR/ 1/4" TRS) with:
gain controls
signal/peak lights
pads for each input
insert jack (1/4"" TRS) for outboard processors
2 balanced outputs (1/4"" TRS)
4 unbalanced outputs (RCA)
2 x 2 S/PDIF digital I/O with w/ 2-channel PCM
S/PDIF out also supports pass-through of AC-3/DTS surround-encoded content
1 x 1 MIDI I/O with activity LEDs
headphone output (1/4"" TRS) with level control
headphone A/B source switch for DJ-style cueing
input/playback mix control for hardware direct monitoring
mono switch for input/playback direct monitoring
master output level control
near zero-latency hardware direct monitoring
low-latency ASIO software monitoring
includes Ableton Live Lite 4 for creative recording and mixing
USB connection to computer
powered via USB or optional AC power adapter

For more info See: http://www.guitarcenter.com/M-Audio-Fast-Track-Pro-Mobile-USB-Audio-MIDI-Interface-103520185-i1126084.gc