It's clearer than ever. Multimedia is here to stay and is ever expanding. Today's computer applications want to be heard, and spoken to, in full technicolor sound! Whether you're roaming the Internet, "tuning out" to a great CD, listening to Internet radio, or actually working on office software, Plantronics' line of DSP Series Digitally-Enhanced USB PC headsets add pure audio-tude. Delivering sound with power and grace, these headsets also offer software that enables you to customize microphone properties for different applications. Join the fun with Plantronics .Audio DSP400 foldable stereo headset! <BR> For passive music enjoyment and interactive voice applications alike, reach for your Plantronics DSP-400 digitally-enhanced USB foldable stereo headset. Listening to music, watching videos with sound, orally communicating through the Internet, responding to language programs, or using voice-based security are commonly used with computers these days. The old, monaural (one-channel) headset is obsolete. Move up to stereo! <BR> The foldable design allows for easy storage and transport. Listen to your CDs, DVDs, or MP3 files. Its noise-canceling microphone enhances speech accuracy. Plantronics PerSono Audio Control Center Software available via Internet download. The PerSono Audio Control Center Software allows users to adjust microphone and audio characteristics like volume, bass and treble, launch their favorite voice or audio applications, as well as select audio presets like rock, jazz or classical, all from a central software interface. Convenient folding mechanism is perfect for mobile use with notebook computers Software is for Windows, but headset is USB ported for PC/Mac compatibility