Features: The electrolytic capacitor signal main circuit adopts Taiwan famous brand, and the main filter capacitor adopts imported special capacitors to ensure strong and continuous power support.  The resistance uses five-ring metal resistors, and the main circuit uses high-precision chip resistors to ensure a good signal-to-noise ratio of the whole machine.  PCB adopts a 1.6mm thick RF4 board, 2.0 oz copper thickness, and a full gold plating process to ensure the good passing performance of large and small currents. First-class PCB quality.  Using Taiwan pure copper (brass) plated 24K gold, plug-in RCA seat. The op-amp uses better OPA1611 OPA1612.  The display adopts the latest technology OLED 2.23-inch high-definition display.  USB adopts XMOS208 imported chip, gold-plated USB socket.  The chassis is made of aviation-grade aluminum alloy deep processing.  Voltage:DC 9V (with 100V-240VAC to 9VDC adapter);  Size:length 103*width 150*height 40MM;  Net weight:0.6KG;     Input Support: Coaxial: PCM44.1k~192k 24bit/DOP DSD64;  Fiber: PCM44.1k~192k 24bit/DOP DSD64;  USB: PCM44.1k~384k 32bit/DSD64, DSD128, DSD256;     Package Included:  1 x DAC Decoder