8 analog in (2 XLR/TRS combo, 6 TRS), 10 analog out (TRS), S/PDIF I/O, MIDI I/O, headphone out, more. Bus-powered off FireWire for portable field recording, or with wall AC. Zero-latency monitoring of multiple sources. SMPTE TC. Works as stand-alone mixer. Comes with AudioDesk software (Digital Performer w/o MIDI).