1、I2S INTERFACE: The digital chip adopts WM8804G chip, I2S interface, supports 16 to 24 bit sound data format, supports high 192kHz sampling rate, the jitter reduction technology can control the inherent jitter within 50ps RMS, the degree of restoration is very high. 2、TWO INTERFACES OUTPUT: Output port using optical and coaxial two interfaces output, convenient for users to external amplifiers; support for hardware way to control the volume (I2C interface). 3、REDUCE INTERFERENCE: Power supply for RasPi power supply, no external power supply, with π type filtering power supply design, effectively reduce the interference of the power supply, non USB interface DAC mode, does not take up other expansion GPIO. 4、POWER INDICATOR: Provide power indicator, easy to observe the status of the expansion board, fiber optic interface using HIFI grade fiber optic seats, coaxial interface using sound isolation transformer, in order to provide a good digital sound at the same time very well protect your sound equipment and the board. 5、INFRARED RECEPTION FUNCTION: HiFi expansion board integrated infrared reception function, in the absence of network, more convenient to control the playback. Item Type: HiFi DiGi+ Digital Sound Card Material: PCB Support: FLAC, WAV, MP3, AAC, ALAC, PLS Music Library: NFS and USB Drives Control Via: Webui Integratedwith PC, Smartphone, Tablet PC Support: Over the Air Playback Function Support: for Ramplay 1 x HiFi DiGi+ Digital Sound Card Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store