Features: Brand new and high quality Uses Wolfson's end WM8804G chip, uses I2S interface; supports 16-24 audio data formats; distortion and dynamics are very good, high 192kHz sampling rate support, advanced shake reduction technology can 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). Power uses Raspberry Pi-driven, no external power; and the use of power of π-type can effectively reduce the interference of power. The use of direct digital output I2S interface, reproduction and high non-USB interface DAC mode, do not use other additions GPIO Raspberry Pi. Specifications: Material: ABS Size: approx. 9x7cm/3.54x2.76in 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! Package includes: 1 x HIFI DiGi+ digital sound card I2S SPDIF optical fiber RCA Raspberry Pi 2/A+/B+