The External Sound Card convenience with 2pcs 3.5mm headphone/1pc microphone port, sound and USB connection for PC sound enhancement This adapter includes a 3.5mm headphone and microphone input, ensuring compatibility across most mobile devices Engineered with ABS/PVC, this USB adapter features sound knob, and LED indicators for real time microphone/headphone Easy to use, not need to drive installation. Suitable for users who need to improve computer sound effects, such as online conference participants Suitable for most headphones and microphones; Supports output and provides immersive sound effects