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Headsets or Bluetooth in Your Car - The iPhone Book: Covers iPhone 4S, iPhone 4, and iPhone 3GS, Fifth Edition [Book]
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Amazon.com: Wildhorn Alta Wireless Bluetooth, Drop-in Headphones - HD Speakers Compatible Any Audio Ready Ski/Snowboard Helmet Headphones. Glove Friendly Controls, Microphone for Hands-Free Calls : Electronics
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