USB drive-free external sound card for enhancing the audio experience of your computer. Features a three-hole output design with a two-in-one headset port plus separate headphone and microphone jacks, allowing two users to connect simultaneously. Supports microphone and audio connection for real-time communication, ideal for family karaoke, video conferencing, and online chatting. Equipped with an external volume control knob for precise sound adjustment and includes dedicated mute switches for headphone and microphone, ensuring convenient and uninterrupted audio enjoyment. Compatible with both TRS and TRRS standards, works with most headphones and headsets. Converts analog signals from tablets, notebooks, desktops, and other audio devices into digital output. Product Name: USB Multi-Function External Sound Card Input Interface: USB 2.0 Output Connections: Microphone interface, headphone interface, 4-pin headset composite interface Signal-to-Noise Ratio: 80dB Headphone Indicator: Blue LED Microphone Indicator: Red LED (illuminates when active) Other Features: Mute switch, volume control knob Supported Systems: Windows, macOS, Linux Cable Length: 10cm Material: ABS Color: Black Package Contents: 1 x Sound Card Note: The package includes only the items listed above. Other accessories are not included. Due to lighting effects and monitor settings, the color of the item may vary slightly from images shown. Measurement tolerance: +/- 1-3cm.