The 882 I/O is an audio interface used with Session 8 (Mac or PC), Pro Tools Project, or Pro Tools III. It connects to any of the following cards: Session 8 SCSI Mac/PT Project (NuBus), Session 8 PC I/O, Disk I/O (NuBus or PCI), Bridge I/O, or DSP Farm-PCI.Analog Input/Output: Active-balanced 1/4" TRS, tip "+", ring "-" (Unbalanced operation is also supported)Digital I/O: 1 S/PDIF digital I/O (RCA)-(Ch. 1-2 input is user switchable between analog & digital. Ch. 1-2 analog and digital outputs simultaneously available.)External Sync: Super Clock (256x sample clock) in/out (BNC)Card Connector: Connection to DSP card via proprietary high-bandwidth data path (50 pin peripheral connector)Sample Rates: 44.1k or 48k; user-selectableAnalog-to-Digital Converters: 1-bit Delta-Sigma; 128x Oversampling; 16-bit output (NuBus-based systems) or 18-bit output (PCI-based systems)Digital-to-Analog Converters: 18-bit; 64x OversamplingOperating Level: rear-panel globally switchable; +4 dBu/-10 dBv operation (14 dB headroom nominal)Maximum Input Level: +18 dBuFrequency Response: 20Hz to 20kHz, +/-1dBSignal-to-Noise Ratio (A/D/A): 84 dB, unweighted, band-limited (22Hz - 22kHz), 91 dB, A-WeightedTHD + N: .009%, 0 dbFS @ 1kHz, 22 Hz - 22 kHz bandwidth.Universal desktop power supply; Power Requirements: 100-250 VAC, 47-63 Hz, 30 W, auto-switching.Dimensions: 1U External rack mount device; 19" x 1.75" x 7.5" (48.26 cm x 4.45 cm x 19.05 cm).Weight: 5 lbs (3kg).