2 in 1: Support and speaking, dual functions. Adds a 3.5mm TRRS aux port (integrated o-in and o-out interface) to your devices. Ideal accessory for all USB-enabled devices such as PC, Laptop, Desktop, and more. Designed for Silent Computer: USB external sound card integrates o input and o output interfaces. Serves as a reliable solution for a faulty or failed sound card or o port. Enables you to connect your existing headset with 3.5mm TRRS to your PC through a USB interface. Plug and Play: No driver required. The system will automatically recognize the USB to 3.5mm adapter within seconds. USB bus powered; no external power needed. Simply plug and play. Extensive Compatibility: Compatible with PCs and other devices. Supports USB o adapter on Windows 10 / 8.1 / 8 / 7 / Vista / XP, Mac OS, Linux, Google Chromebook, and Windows Surface 3 Pro, etc. (Note: Headsets with separate headphone and microphone 3.5mm o ports are not supported.) Durable Design: Premium metal casing and cotton braided cable ensure long-lasting use. More durable than standard plastic casing and PVC cable USB adapters. Color: Black Material: Metal + braided wire Size: Cable length 20cm Package Contents: 1 x External sound card Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.