Be the game with the ultimate earphones for your PSP. The Shure E4g uses the same award winning sound and design used in the E Series line.The E4g Sound Isolating (tm) Earphones feature high definition drivers with Tuned Port technology to deliver an ultra-wide audio range with brilliant highs and extended bass. As the ultimate companion to your portable gaming devices, the E4g combines premium performance audio with innovative design and sound isolation to create an unmatched immersive gaming experience. It's also compatible with your iPod Nano. The E4g includes a full selection of sleeves to ensure a perfect fit and a zippered carrying case. In black, of course. Shure makes audio equipment - microphones, earphones, mixers, etc. that are used by professional musicians the world over. Shure knows sound. If your sound is important to you, you want earphones engineered with the same kind of technology that your favorite divas and bands use to be sure they can hear themselves during a performance. That's Shure's "Sound Isolating" technology. Rather than introducing external elements to block out ambient sound (as noise cancelling earphones do), the Shure system creates a sealed environment that keeps noise out, without covering it up by injecting noise-cancelling artifacts that can interfere with your gaming or your music. You'll hear details you never heard before.