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The KEB7 don't offer sound isolation, but they do come in four lovely opaque colors: white, pink, blue, and green. Match them with your Nano or other colorful MP3 players--and for just $9.99.

Updated:Caption:CNET Reviews staffPhoto:Koss
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The SB49 is what Koss refers to as a "Communication Stereophone," which essentially refers to the built-in mic. This feature makes the headphones a proper fit for interactive gamers and those who use PC voice applications. The SB49 offers a collapsible design for easy storage and transport, an ample 8-foot cord, and a palatable price point ($44.99).

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The Cobalt uses A2DP Bluetooth (that's stereo Bluetooth, in layman's terms) to play music completely wire-free. The headphones, which are priced at $299.99, provide a 30-foot range and a rather paltry eight-hour battery life. The package includes two transmitters: one USB for use with a computer, and one standard 3.5mm jack connection for MP3 players.

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The cheapest of Koss' sound-isolating earbuds, the KEB20s come in three colors (blue, pink, or green) and only cost about $20.

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For those who only have a five-spot to spare, there's the ultrasimple KEB4. But be forewarned: these probably don't sound much better than the stock pair that came with your MP3 player.

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Working on a budget? The KSS10s only cost $10 and feature a behind-the-neck design, which is favored by many active users due to the secure fit.

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The Tugo is a combo MP3 player and headphone set with controls built into the right earpiece. It features 512MB of memory, a 10-hour rated battery life, and a standard mini USB connection for syncing with a PC. It better sound great, too, considering its premium $299.99 price tag.

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Like the dark look? These color-accented (pink, green, white, or blue) sound-isolation earbuds won't set you back, with a very manageable $24.99 price tag.

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The KDE129 includes two transducers for each ear (read: high quality audio performance) and offers a secure earclip design for active users. These headphones include a carrying case and will sell for $199.99.

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At $99.99, the KEB79 is Koss' high-end sound-isolation earbud. These phones are lightweight, and include a protective case, a wax cleaner, and an extension cord for added convenience. Three sizes of silicone ear tips should provide a secure fit for most users.

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