Nuforce ICON-HDP-BLUE High Performance Digital to Analog Converter, Headphone Amp and Pre Amplifier USB 2.0 Full Speed compliant and 1.1 supported, 8-96kHz/16-24-bit (88.2kHz is not supported) S/PDIF input: Coaxial up to 192kHz/24-bit or Optical up to 192kHz/24-bit Analog input: 3.5mm or RCA input Audiophile-grade DA converter Low-distortion, high-current headphone amplifier