... play and support USB 16bit B. Coaxial and optical 24BIT/192K ,24bit/192K music playback C,Modular headphone-amp design , ... as USB DAC, USB sound Card , Headphone –amp and Pre-amp Headphone-amp 6.5mm headphone jack, it can drive 30-300ohm headphone USB DAC ... appearance design 5.)Specifications : Function USB Sound Card ,DAC,headphone –amp ,pre-ampInput SIF×1 USB(1.0)×1 OPTICAL×1 , Analog ...