Function: Supports coaxial SPDIF output Can be connected to the phone OTG Supports I2S output, can be connected to an external decoder Internally includes ES9023 independent decoding audio output Uses CM6631A, which is more cost-effective than the CM6631 chip and offers better performance More stable compatibility. Features a professional PCB with full component placement and precision component design. All components use active low-temperature poles CM6631 supports feedback endpoint for playback to control data transmission accuracy, i.e., asynchronous USB. Details and analysis are impeccable Cmedia CM6631 is the world's first USB2.0 true high-speed audio processor, supporting the latest USB Audio Device Class Definition V2.0 and high-definition audio processing capabilities up to 192KHz / 32bit, with a maximum support of 32BIT With a USB to coaxial output interface, it only supports asynchronous 24BIT192K output and can be used to upgrade external DACs. Compatible with WINXP, WIN7, WIN8 32BIT and 64BIT systems. Supports DTS and other source outputs Specifications: Voltage: 5V Output 1: Audio input, with ES9023 high-precision decoding IC, with internal drive circuit pull-up 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. Please make sure you don't mind before bidding. 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