Use ES9039Q2M JRC5532 Electrolytic capacitors use imported ELNA capacitors Resistors use high-precision chip resistors to ensure a good signal-to-noise ratio for the whole machine PCB uses 1.6mm thick double-sided board, 2.0 ounces copper thickness, tin spraying full process, to ensure good current handling performance for both high and low currents Made 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, 3.5mm terminal can be connected to headphones Input support: Coaxial: PCM44.1k~192k 24bit/DOP Optical: PCM44.1k~192k 24bit/DOP I2S/DSD: PCM44.1k~384k 32bit/DSD64, DSD128, DSD256, DSD512 Audio input settings: IIS short, IIS signal input SPDIF short, optical input COAX short, coaxial input Material: PCB Color: As shown (Batch differences may result in variations in product parts or printed characters, does not affect functionality) 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 to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm