1. The digital chip adopts Wolfson's high-end WM8804G chip, adopts I2S interface; supports 16 to 24-bit audio data formats; distortion and dynamics are very perfect , supports a high sampling rate of 192kHz, and advanced de-shake technology can inherent jitter ( Intrinsic period jitter) is controlled within 50ps RMS, and the degree of reduction is extremely high. 2. The output port adopts optical fiber and coaxial interface output, which is convenient for users to connect to the power amplifier 3. Supports volume control by hardware (I2C interface) 4. The power supply is powered by , no external power supply is required; and -type filter power supply design is adopted, which effectively reduces the interference of the power supply 5. Direct digital output with I2S interface, high restoration, non-USB interface mode, not occupying other extended GPIOs of the Provide a power indicator light for easy observation of the status of the expansion board Good sound depends on real materials. The optical fiber interface uses HIFI-grade high-quality optical fiber sockets, and the coaxial interface uses Pluse audio isolation to provide good digital audio while protecting your audio equipment and boards! ! ! (For the sake of cost, similar foreign products have been removed. For the sake of sound and reliability, we will never spare the cost and never cut corners) Integrated infrared receiving function, it is more convenient to control the playback when there is no network. Material:plastic colour:Blue Package Contents: 1 x sound card For 3 Only the above package content, other products are not included. Note: Light 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.