D25 7.1 Channel USB External Sound Card Audio Adapter with Mic Out Advanced digital technology was used to transform a USB port into a virtual 7.1 channel Sound Card 7.1 USB External Stereo Sound Adapter. 7.1 channels of dynamic sound are achieved using 5 multi-channel technology. With the sound card adapter, you may enjoy stereo sound, protection against electromagnetic interference, and the highest possible sound quality. Excellent for using Skype, ICQ, Google Hangouts, and TeamSpeak, and also appropriate as a second sound source allowing headphones and loudspeakers to be used simultaneously. FEATURES 2 Volume keys: Volume-Up / Volume-DNo need to drive. No external power adapter is required. own. 2 Function keys: Microphone-Mute / Speaker-Mute. A small LED Indicator. Save the cost of replacing a failed sound card. USB 2.0 Full-Speed (12Mbps) USB HID Class Specification 1.1 USB Audio Device Class Specification 1.0. EASY TO CARRY Tired of trying to stretch your cables around the back of your computer? Plug this Adapter into a USB port on the front, and use the headphone jack (for output) or the microphone jack for effective cost The 7.1 USB External Stereo Sound Card is ideal for getting around a problematic sound card, audio port, or for switching out a damaged USB audio adapter. It expands your computer's USB port to add a mono microphone-in and a stereo audio-out port, allowing you to use your current 3.5mm jack-equipped speakers, headphones, microphones, and headsets to connect to your PC via a USB interface. Save money by not having to buy a new sound card.