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Title: Unusable
Review: I purchased this product hoping to be able to listen to my iPod through my car radio, and I found it completely unacceptable for this purpose. I was not able to receive a clear signal on any of the four supported frequencies. There was usually a lot of background hiss. This could be reduced by moving the unit around in the car, from dashboard to front seat, back to dashboard, etc. Even when I managed to eliminate the hiss, the audio was still muddy and distorted. Thinking the problem might have been due to my car stereo, I tried it in a friend's car with the same results. This was in the Washington, DC metro area, where the FM band is crowded. Results might be better in rural areas, or perhaps in a car with a windshield antenna rather than an outside one. I eventually gave up on the iRock and replaced my car stereo with one that has an auxiliary input.
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