Mute function keys: microphone speaker mute automatically defined as increases the volume - down in front of the song the song stop/start. Including Xear 3D 8.1 channel sound simulation software for Windows XP or Vista. System rwquirement computer desktop or PC USB port Windows 98 se / 2000 / XP / 2003 / Vista/Windows 7 / doing/server Linunx Macos Xear of 10 or higher 3 d (virtual channel sound simulation software) 8.1 for Windows XP or Vista stereo or mono active stereo headset microphone (optional). Fully support WAV/MP3 / WMA/MPEG1 (VCD)/MPEG2 SVCD)/AVI/DVD_Audio/DVD_AC3 DVD_DTS/DiVX format file; Using the most advanced Xear 3 d technology comprehensive support DirectX MS EAX1.0/2.0 3 dx HRTF function; Multi-channel technology strong virtual 8.1 channel dynamic sound; Digital button design convenient to control the volume; Basic function: Sound effects: intelligent software 8.1 channels all kinds of sound field special effects manufacturing a variety of environmental effects and the distance feeling deal with karaoke input effect.Interface: USB interface without external power supply can be used for USB version decentralization USB1.1 version plug and play can be used for any equipments.With USB interface of PC and notebook on the table. Suitable for DVD digital products music games and online use.