Benchmark DAC1 USB Black Two Channel, 24-bit, 192-kHz, D-to-A Conversion Jitter Immunity with Ultra Lock technology 1 x USB, 1 x AES, 1 x S/PDIF, and 1 Toslink input. Balanced XLR outputs, and unbalanced RCA outputs. Driverless USB 1.0 - 96kHz, 24-bit HPA2 headphone power amplifier