Item Type: External Sound Card 1.3.5mm audio port and microphone port, namely earphone + headset, to realize the function of listening to music and voice. 2. High-fidelity noise reduction design to avoid transmission interference and restore the original music 3. Stereo sound effects support mixing 4. Suitable for many devices, plug and play 5. Support wire control function 6. CN Plug/US Plug earphones can be used, compatible with most earphones on the market, and solve the problem of mobile earphones having only accompaniment or background music, and the microphone is invalid. Features: 1. Mini is convenient and easy to carry 2. Aluminum alloy material 3. Plug and play 4. 7.1 channel 5. Support all systems Audio Port: Approx. 3.5mm / 0.1in 1、3.5mm audio port and microphone port, namely earphone + headset, to realize the function of listening to music and voice 2、High?fidelity noise reduction design to avoid transmission interference and restore the original music 3、This sound card suitable for many devices, plug and play, very convenient to use 4、CN plug/US plug earphones can be used, compatible with most earphones on the market 5、Can solve the problem of only accompaniment or background music in the mobile phone headset, and the microphone is invalid. 1 x External Sound Card