Features: Adopts original PCM5100 and MS8416, USB uses custom secret decoding chips. Resistance uses a five-ring metal resistance, and the main circuit uses a five-ring metal film resistance with an accuracy of ±1% to ensure a good signal-to-noise ratio. Coupling capacitor uses chip input capacitor, main filter electrolytic capacitor, capacity 2200UF/25V, ensuring strong and continuous power. PCB uses 1.6mm thick double-sided sheet, 2.0 oz copper thickness, spray tin full process, to ensure good fitting performance for large and small currents. Coaxial input supports up to 96KHZ, optical input supports up to 96KHZ, USB supports 48K. Specifications: Material: PCB Size: Approx. 144x83mm/5.67x3.27in Voltage: DC 12V Note: Please allow 1-2cm errors 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! Package includes: 1x Optical Audio Decoding Board