MANHATTAN 3D 7.1 Hi-Speed USB Sound Adapter (151429) Easy-access keys: microphone mute, speaker mute, volume up, volume down Confirming LED indicators: microphone mute, status, activity Easy USB installation requires no external power or software Plug and play, hot-swappable, includes Xear 3-D and virtual 7.1 channel sound simulation software for Windows 7/8, and Mac compatible Instantly creates mic-in / audio-out connectivity through any USB port  ideal for desktop, notebook and netbook PCs Improves access, bypasses faulty sound cards or audio ports and upgrades audio performance Supports 3D and virtual 7.1 surround sound and includes preset sound effects with 10-band equalizer