Features: brand new and high quality After using this expansion board, user can coordinate with the broadcast system (volumio,xbmc system etc.) to set up your own HIFI player network. Updated DAC chip with BBTI Company's PCM5122 chip. PCM5122 DAC chip and I2S interface, Perfectly for the official PI HAT size, PCB board with gold plating on the tall, curved traces (high-end Hifi DAC are using curved alignment), to better ensure the continuity of the impedance signal to reduce signal reflections and refractions. It has I2S port and you can use the I2C port to control the volume and the frequency parameter. It support 16 to 32 frequency data format. Distortion and dynamic condition are very . It supports the high 384 kHz sampling frequency and dynamic range is 112dB with distortion factor -93Db. With isolated power design, the power and DAC part of the independent power supply are isolated. Common ground without disturbing each other through the beads, it can get rid of the current sound. Specifications: Material: ABS Size: approx. 9x7cm/3.54x2.76in Package Includes: 1 x Sound Card Module note: Light shooting 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 +/- 1-3 for cm.