... support USB 16bit B. Coaxial and optical 24BIT/192K ,24bit/192K music playback C,Modular headphone-amp design , OP+BUF framework D ... to 24bit /192 K D. Add the optical input interface E. Add the pure pre-amp function , the device can be used ... : Function USB Sound Card ,DAC,headphone –amp ,pre-ampInput SIF×1 USB(1.0)×1 OPTICAL×1 , Analog RCA *1 Output Output ...