Features: Adopt original PCM5100 and MS8416, USB uses custom secret decoding chip. The resistor uses a five-ring metal resistor, and the main circuit uses a five-ring metal film resistor with an accuracy of plusmn1% to ensure a good signal-to-noise ratio. Coupling capacitor adopts chip inlet capacitor, main filter electrolytic capacitor, capacity 2200UF/25V, ensuring strong and continuous power support. PCB uses 1.6mm thick double-sided sheet, 2.0 oz copper thickness, spray tin full process, to ensure good passing performance of large and small current. Coaxial input support to 96KHZ, optical input support to 96KHZ, USB support 48K. Specifications: Material:PCB Size:Approx.144x83mm/5.67x3.27in Voltage:DC 12V Package Includes: 1x Optical Audio Decoding Board note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!