... Plug and play and support USB 16bit B. Coaxial and optical 24BIT/192K ,24bit/192K music playback C,Modular headphone-amp ... Single chip software control , coaxial and optical fiber to 24bit /192 K D. Add the optical input interface E. Add the pure pre ... ,DAC,headphone –amp ,pre-ampInput SIF×1 USB(1.0)×1 OPTICAL×1 , Analog RCA *1 Output Output terminal , Analog RCA * 1 , 6.5MM headphone ×1Frequency 10HZ ...