Features: brand new and high quality Using Wolfson's end WM8804G chip, using I2S interface; support 16-24 audio data formats; distortion and dynamic is very good, tall 192kHz sampling rate support, advanced shake reduction technology can be jitter (period jitter) control within 50ps RMS, the high degree of reduction. The use of optical fiber and coaxial outputs two output interfaces, user-friendly external amplifier. Support in hardware volume control (I2C interface). The power supply uses powered, no external power supply; and the use of π-type filter power supply design can effectively reduce the interference of power supply. The use of direct digital output I2S interfaces, reproduction and high non-USB interfaces DAC mode, do not use other extensions GPIO Pi. Specifications: Material: ABS Size: approx. 9x7cm/3.54x2.76in Package Includes: 1 x HIFI DiGi+ Digital Sound Card I2S SPDIF Optical Fiber RCA 2/A+/B+ note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!