Perfect complement to portable DVD, IPOD players or laptops. Has built-in DVD drives. These surround sound headphones simulates the home theater experience whether you're listening privately on a plane,in a hotel room, or even at the beach. Each bud features a single 15 mm neodymium speaker driver with a frequency response of 20 Hz to 20 kHz. But when combined, the buds incorporate Philips' patented virtual surround technology to create a robust, multichannel-like environment. Though not "true" surround sound, it's as close as a listener will get through a two-channel source, especially one that fits nice and comfy inside the ear canal. These buds come with a stylish,flexible, molded-rubber carrying case. It has an ample 3.9-ft cord that should be long enough for most applications. The cord's flexi-grip end connection hangs tough to rough handling and its 24k gold-plated plug makes for the best possible signal transfer which equals a better overall sound. The sound is superb! Purchase includes your choice of Free CD for your listening pleasure.(Click on pictures to enlarge for details) (IPOD and EarBuds are registered trademarks)