Use ES9039Q2M JRC5532Electrolytic capacitors use imported ELNA fever capacitorsResistors use high-precision chip resistors to ensure a good signal-to-noise ratio for the whole machinePCB uses 1.6mm thick double-sided board, 2.0 ounces copper thickness, tin spraying full process, to ensure good passing performance of large and small currentsMade of high-quality materials, sturdy and durable Voltage: DC 9-12V (5.5 x 2.1 socket, inner + outer -)Output terminal: RCA can be connected to power amplifier, headphone amplifier, 3.5 terminal can be connected to headphonesInput support:Coaxial: PCM44.1k~192k 24bit/DOPOptical: PCM44.1k~192k 24bit/DOPI2S/DSD: PCM44.1k~384k 32bit/DSD64, DSD128, DSD256 DSD512Audio input settings:IIS short, IIS signal inputSPDIF short, optical inputCOAX short, coaxial inputMaterial: PCBColor: As Shown(Batch different, product parts, printing characters will be different, does not affect the use of) Package Contents:1 x DAC Decoder Board Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.