Garmin GXM-40 For GPS-MAP640
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Setting up the GXM 40 is fast 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 unit. Then choose the XM subscription that best fits your needs to start receiving XM satellite services.
Choose Your Subscription
The type of information GXM 40 provides to your unit depends on your subscription package. Compatible automotive units display traffic, which includes basic weather information, with a subscription to XM NavTraffic. Automotive units can also play XM Satellite radio. See our XM web page for more information on the XM services available for your unit.