Napster, Amazon MP3: Digital Music Done Differently

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At a Glance

Offers killer playlists and listen-anywhere convenience.

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At a Glance

Watch out, iTunes: This easy-to-navigate store is cheap.

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50 Cent's headphones will measure your heart rate

Aug 15, 2014 11:18 AM

Biometric headphones that measure your heart rate will be out later this year from SMS Audio.

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50 Cent's headphones will measure your heart rate

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