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Title: $$$$ EXPENSIVE! There's gotta be some gold in it somewhere?
Review: This is one of those things that you must purchase if you want to use the available features on your Garmin GPS. Shop around for the best price, that's all I can advise. FOLLOW-UP: Jan 2009 I later learned that this is in fact THE xm radio...not simply an XM antenna for the Garmin Zumo 550. Knowing that made more sense as to why it has an expensive price tag. I use it all the time in the car and on my motorcycle and I LOVE XM radio and the traffic alert and weather alert capabilities. Only thing missing is video!
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