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 all functions commonly used with computers these days. The foldable design allows for easy storage and transport. Listen to your CDs, DVDs, or MP3 files. Its noise-canceling microphone enhances speech accuracy. 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. The convenient folding mechanism is perfect for mobile use with notebook computers. The included software is for Windows, but headset is USB ported for PC/Mac compatibility.