Dynamode USB-SOUND7 7.1-Channel USB External Digital Sound Adapter - Plug in Headphones & Microphone Through a USB Port! Dynamode USB-SOUND7 7.1-Channel USB External Digital Sound Adapter General Features: USB 2.0 Full-Speed (12 Mbps), USB audio device compliant USB Bus powered, no external power needed Red and green status indicator lights Xear 3D, virtual 7.1 sound simulation 7.1-Channel support C-Media CM119 chipset Lead-free Control features: Microphone mute button Audio mute button Volume Up button - NOTE: 1-YEAR DIRECT WARRANTY