Creative Aurvana X-Fi Headphones are the world's first noise-canceling headphones equipped with X-Fi technology. The noise-cancellation feature lets you enjoy your music without unnecessary distraction. X-Fi technology breathes life into your songs by restoring detail and expanding your music and movies to surround sound. X-Fi Crystalizer technology restores the detail and vibrancy to your compressed music and movies. All the highs and lows are intelligently enhanced, ensuring you hear everything in crystal clear clarity. X-Fi CMSS-3D technology expands your stereo MP3s and digital movies into virtual surround sound over the headphones. Voices are centered in front of you and ambient sounds are moved all around you. The noise-cancellation technology significantly reduces background and environment noise by up to 90 percent. You can even detach the audio cable and continue using the headphones to block out noise while you sleep. Large 40mm drivers are acoustically tuned to produce an accurate and linear response, be it for music or movie enjoyment. You can now connect your headphones to the seat socket of the airplane, your home entertainment system, MP3 players, iPod and even the iPhone. You can easily place the phones and all the bundled accessories into the included travel case and bring it along with you wherever you go.