Benchmark ADC1 USB - Silver Edition, 2 channel high end a/d converter with plug and play USB-Interface, 24Bit 192kHz, dynamic range 120 dB(A), main- and aux output with variable and independent resolution and samplingrate, referenz AES, SPDIF, Wordclock and Superclock UltraLock eliminates Jitter, 9 segment LED Metering with peakhold, balanced XLR inputs, max inputlevel +28 dBu, output: AES, SPDIF, Opt. (main) SPDIF (AUX), The USB input is compatible with Windows Vista/XP/2000 and Mac OS X, and does not require driver installation or system configuration, internal powersupply, 115 - 230 V.