... . Plug and play and support USB 16bit B. Coaxial and optical 24BIT/192K ,24bit/192K music playback C,Modular headphone-amp ... which combines into a mini( high quality )audio system F. Linear power supply , sound clearer G,Multi-point MCU and dual ... ,headphone –amp ,pre-ampInput SIF×1 USB(1.0)×1 OPTICAL×1 , Analog RCA *1 Output Output terminal , Analog RCA * 1 ...