0ur opinion:

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The addition of XM Traffic, Weather and Radio services to your compatible Garmin makes driving with GPS essential, even if you know where you're going. With an optional subscription to XM NavTraffic, your Garmin notifies you of accidents, road construction, and weather-related traffic delays before they are encountered, and then offers an alternate route. XM WX Weather brings real-time, animated weather data directly to your unit, so you can steer clear of bad weather. Add XM Satellite Radio to the mix for hours of commercial-free listening enjoyment. XM reception requires this portable antenna s a subscription to XM service. The type of information GXM 30 provides to your unit, depends on your XM subscription package.
Garmin's GXM30 XM satellite module is the best way to receive traffic, weather and radio feeds, through your car stereo. This smart antenna processes all the XM information it receives and sends the finished data to your unit for display.

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The compact, all-in-one GXM 30 delivers XM satellite weather, traffic, and radio to your compatible Garmin GPS navigator. With the GXM 30 and a subscription to one of XM's satellite services, you can check the weather, avoid traffic backups, or listen to commercial-free radio while driving with your navigator in tow. Setting up the GXM 30 is quick and easy: simply position the antenna where it has a clear view of the sky and connect it directly to the USB port on your GPS receiver. 0nce you've chosen the XM subscription that best fits your needs, you'll start receiving XM satellite services immediately.

The type of information you receive depends on your subscription package. XM NavTraffic notifies you of accidents, road construction, and weather-related traffic delays before you encounter them, and then offers an alternate route on your GPS. XM WX Weather, meanwhile, brings real-time animated weather data directly to your screen, letting you steer clear of bad weather or choose a less snowy mountain pass, for instance. Finally, XM satellite radio offers dozens of commercial-free music, talk, sports, and news stations--one for virtually every genre in existence. The GXM 30, which measures roughly 3 inches in diameter, fits the following Garmin navigators: the GPSMap 376C, GPSMap 378, GPSMap 478, GVN 52, StreetPilot 2820, StreetPilot 7200, StreetPilot 7500, StreetPilot 2730, and zumo 550. lt's also backed by a one-year warranty.

What's in the Box
GXM30 satellite antenna, user's manual.








Piece Availability: Usually ships in 24 hours

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Buyer's feedback: - * GARMIN GXM 30 XM SATELLITE ANTENNA ...
I was happy to get the Garmin 7200 but wasn't sure if I needed the GXM30 satellite receiver as I thought maybe the antenna that I have for my truck might work, it did not. I think this is Garmin's way of making more money. Frankly, I purchased the Garmin 7200 for $470.00, I like the device but could never imagine paying over $1000 for it when it first came out in 2006.
For truck drivers the big screen is helpful, and having the traffic alerts do help but for truckers it's not easy to get off the next exit and go around because if you don't know the road there is no telling the trouble you can get into. I hope that Garmin comes out with trucking software soon. With all of the gps devices on the market only a few are for truckers, go figure.

With the XM service you get traffic and weather. The weather service tells you about severe weather alerts, current and forecast weather conditions. This helps me figure out if I want to shut off my truck for the night based upon low temps. I really can't imagine anyone wanting to go around without a gps. With prices coming down it's well worth the investment.

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Buyer's feedback: - GXM 30 works great
I bought the GXM 30 XM antenna to pair with my Garmin Streetpilot 7200 so that I could get XM's Navtraffic and Navweather in addition to XM Radio. I have used it for about a month and so far I am very pleased. I tried two other GPS units with the traffic alerts feature before I decided to give XM's Navtraffic a trial. It seems to provide more accurate alerts and on the Garmin it will display a live traffic map that shows color coded traffic delays on major routes. It also seems to update the map often so you are given fairly recent info on accidents and slowdowns.

I also like the Navweather which provides not only forecasts for the areas that you are traveling in but severe weather alerts and warnings. I received a first tornado warning for the area of my home from Navweather. The XM radio integrated in the GXM 30 works well, no complaints. On the Garmin 7200 the display is large and it operates via touchscreen. Very convenient.

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Buyer's feedback: - * GXM 30 ...
To complete the garmin system you need to have this antenna with the XM traffic set up at the very least.
Good antenna but the price is a little high.

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Buyer's feedback: - Unadvertised Drawback!
This thing is crap! The only reason to spend all this money on the Zumo is for the hands free bluetooth features in your helmet, otherwise there are lots of cheaper products to use. The XM radio is restricted from playing music on your bluetooth headset, which renders this thing less than useful. Garmin doesn't bother to tell you this in the product info either. CRAP!!!!

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Buyer's feedback: - * Pricey, but certainly nice ...
I've now used the GXM30 for a month and am happy with it. Unlike the antennas that I've used in the past for listening to XM radio on other motorcycles or in my truck, this design doesn't suffer from reception issues. I have ridden through the Sierras, as well as in built-up areas (San Francisco), never having lost a signal. In fact, it even receives a strong signal when the bike's in the garage with the door closed!
My only complaint would be that the unit is huge compared to other antennas, but it also has the actual receiver in it, so I can't complain too much. It's not a passive unit, so it does generate some heat, but never enough to be an issue as to where it's mounted. I have noticed that the mounting angle is somewhat critical, but as long as it's somewhat level, the reception is phenominal.
Absolutely recommended if you have a GPS that acts as an XM control head, versus having a GPS plus a (non-waterproof) XM radio receiver/antenna also mounted on the bike. Additionally, by using the GXM30 through a ZUMO 550, I have had no grounding issues or other forms of interference problems. Nice combination that works very, very well. Too bad it's so pricey.