Use ES9039Q2M JRC5532 Electrolytic capacitors use fever capacitors Resistors use high-precision chip resistors to 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 good passing performance of large and small currents Made of high-quality materials, sturdy and Voltage: DC 9-12V 5.5 x 2.1 socket, inner + outer - Output terminal: can be connected to power amplifier, headphone amplifier, 3.5 terminal can be connected to headphones Input support: Coaxial: PCM44.1k~192k 24bit/ Optical: PCM44.1k~192k 24bit/ 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 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.