Mini USB decoder module:Mini PCM2704 USB Sound Card / Decoding Board,USB power supply, analog output. It plugs directly into the USB port of the computer, eliminating the need to connect. The main chip adopts Hifi-level PCM2704 USB decoding chip, whose performance is the most commonly used low-end chip CM102S series on the market. The power supply is USB, and the output end can be directly connected to the headset or the front stage. The digital output feeds the SPDIF digital signal to more advanced decoders for better sound quality. Due to the external sound card, avoid serious electromagnetic interference in the case, signal-to-noise ratio and sound quality can be improved. PCM2704 is a single chip digital - to - analog conversion chip. It has two digital - to - analog conversion output channels and an integrated USB interface controller. This interface complies with USB1.1 standards. The PCM2704 can receive 16-bit stereo or mono audio data with sampling rates of 48KHz, 44KHz and 32KHz. The integrated software volume and mute function can synchronously adjust the volume and mute of the computer. Power supply voltage: 5 V (USB) Distortion: +N: 0.006% (RL 10 k) Distortion: +N: 0.025% (RL = 32) Signal to noise ratio: 98 dB Dynamic range: 98 dB Earphone output power: 12 mW (RL = 32 ) USB supports sampling rate: 16BIT/32-48KHZ USB system support: for WINXP/WIN7/WIN8, for OS 9//for Android 4.0 or above (OTG-enabled models required) Colour:As Shown Material:Metal+Plastic Package Contents: 1 x decoding board Module Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.