The material is now a key part of Griffin's popular iTrip, an FM radio transmitter that can be used with Apple's iPod Nano.

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The material is now a key part of Griffin's popular iTrip, an FM radio transmitter that can be used with Apple (nasdaq: AAPL - news - people )'s iPod Nano.

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It will take advantage of a two convenient facts about FM radio, first that there isn't a square inch of land in the U.S. or Canada, or for that matter much of the world, that isn't within range of an FM radio transmitter.

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While most of you probably carry an all-in-one NAV with a built-in GPS receiver, the MG-920 is designed to connect to Bluetooth navigation systems that need a little help syncing with satellites, and although the SiRF Star III LP chip and rechargeable Li-ion cell are entirely average, the bottom-mounted FM transmitter allows a turn-by-turn instructor to be channeled to one's FM radio.

ENGADGET: Mainnav MG-920 Bluetooth GPS receiver touts FM transmitter