Ugreen USB Audio Adapter is designed to solve your problem of missing an audio adapter or 3.5mm audio adapter not working, allowing you to immerse yourself in a fantastic audio worldMake sure the USB audio adapter is set as your primary playback and recording device in your Control Panel or System PreferencesThe 4-pin combo microphone/headphone jack only supports the TRRS CTIA standard, not the TRRS OMTP standardThe input to the microphone jack and combo microphone/headphone jack only supports monoPlease make sure your mobile phone supports OTG function when using it on a mobile phone Specifications: Input: USB 2.0 A maleOutput: 3.5mm headphone jack, 3.5mm microphone jack, American standard 4-pole headphone jackSignal-to-noise ratio: ≥85dBFrequency response range: 20Hz-20KHzFunction: Disable sound, mic, and volume adjustment. Support hot-swap, no driverProduct size: L74 x W34 x H15.5mmLine length: 1m Package included: 1 x USB Audio Card 1 x English and Chinese Manual Other items not included