Item Type: DAC Decoder Module Material: PCB Model: PCM2704 Distortion: THD+N: 0.006% (RL> 10 k) Distortion: THD+N: 0.025% (RL = 32 ) Signal to Noise Ratio: 98 dB Dynamic Range: 98 dB Headphone Output Power: 12 mW (RL = 32 ) USB Support Sampling Rate: 16Bit 32k-48k USB Support System: For WINXP/WIN7/WIN8 / OS X 9/OS X / Android 4.1 or higher system(need to support OTG models) Package List 1 x DAC Decoder Module 1. Do not use overload.2. Do not use overvoltage.3. Do not use over current. 1Integrated software volume and mute function inside the chip, which can adjust the volume and mute of the computer simultaneously 2The external sound card avoids serious electromagnetic interference in the chassis, the signaltonoise ratio and sound quality are improved 3Powered by USB, the output end can be directly connected to the earphones, and can also be used as a prestage 4Headphone output power is only 12 mW (RL = 32 ), USB support sampling rate is 16Bit 32k48k 5USB support system for WINXP/WIN7/WIN8 / OS X 9/OS X / Android 4.1 or higher system(need to support OTG models)