USB drive-free external sound card for enhancing the o 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 o connection for real-time communication, ideal for family karaoke, online chats, and video calls. Equipped with an external volume control knob for easy adjustment and dedicated mute switches for headphone and microphone for convenient operation. Compatible with TRS and TRRS modes, works with most headphones and converts analog signals from tablets, laptops, desktops, and o 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 Microphone Indicator: Red (illuminates when active) Other Features: Mute switch, volume control 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 reflections and differences in display screens, the color of the product in images may slightly vary from the actual item. Measurement may vary by ±1-3cm.