Feature: Supports coaxial SPDIF output Can be connected to the phone OTG Support I2S output can be external decoder The internal includes the ES9023 independently decode audio output Using CM6631A, more cost than the CM6631 chip, better performance Compatible more stable. By the professional PCB full post, precision parts design. All using posts active low temperature CM6631 support playback feedback endpoint to control the accuracy of data transmission, that is, asynchronous USB. Details and analysis,are beyond reproach Cmedia CM6631 is the world's first USB2.0 real high-speed audio processor,can support the latest USB audio device class definition V2.0 and high-definition audio processing capacity up to 192KHz / 32bit,maximum support 32BIT With USB to coaxial output interface,support asynchronous 24BIT192K only output,can be used to upgrade the external DAC.for WINXP WIN7 WIN8 32BIT and 64BIT system.Support DTS and other source output Specifications: Voltage:5V Output 1:audio input,with ES9023 high-precision decoding IC,with internal drive circuit thrust Output 2:I2S output, can be connected to other DA equipment Output 3:SPDIF output! That is, coaxial output Size:10.6x7x2.5cm/4.17x2.76x0.98inch Note: Please allow 1-3mm 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: 1x CM6631A Board