The Plantronics DSP 400 Skype Bundle includes the Plantronics' DSP-400 digitally-enhanced foldable stereo headset and a free trial of Skype's premium services. The Plantronics' DSP-400 digitally-enhanced foldable stereo headset with full-range stereo sound features the foldable design which allows for easy storage and transport. Listen to your CDs, DVDs, or MP3s. The noise-canceling microphone enhances speech accuracy. It is packaged with Plantronics' PerSono Audio Control Center Software. Skype technology enables free, superior quality, unlimited worldwide voice calls via broadband, LAN and hot spot wireless IP connections. Skype is the global leader in offering free worldwide calling, a robust user-propagated directory, multi-language selection and expanding services such as global conference calling. Using a Plantronics headset, users can achieve Internet audio performance that rivals or exceeds traditional landline quality.