USB multi-function external sound card tuner with built-in sound output function. Acts as both an expander and a speaker. Supports USB2.0 high-speed transmission with a theoretical speed of up to 480Mbps for fast file reading. Supports listening and speaking two-in-one function. Connect via 3.5mm o port for immersive music experience. Compatible with notebook connections to headphones and microphones. Can be used with headphones only or simultaneously with microphones for singing or live streaming. Provides computer interface extension with 3 USB ports that support connection to devices such as mouse, keyboard, USB drive, hard disk, card reader, printer, fan, and game controller. Equipped with volume adjustment function for easy one-hand control of sound levels. Features an aluminum alloy shell that is oxidation-resistant, durable for daily use, and provides efficient heat dissipation for smooth operation. Includes a flexible PVC outer cover that is anti-winding, tangle-resistant, wear-resistant, and pull-resistant for extended lifespan. Plug and play – no driver required. Interfaces: 3 x USB2.0, headphone port, microphone port, volume control, external speaker output. Compatible with: USB storage devices, keyboards, mice, headphones, headsets, microphones, speakers, and more. Note: The color of the microphone interface may vary randomly; appearance may differ slightly between batches but does not affect functionality. Color may vary slightly due to lighting or display differences. Color: Black Material: Aluminum Alloy Package Contents: 1 x USB External Sound Card (Other items not included) Note: Lighting and display differences may cause slight color variations. Measurement error allowed within +/- 1-3cm.