The GTM 20 is an integrated FM Traffic Message Channel (TMC) traffic receiver, antenna and 12-volt power adapter. It receives digital traffic information for North America,* allowing your compatible Garmin device to route you around accidents, construction and other obstacles to save you time.
Covers North America.
Combines antenna, traffic link and 12-volt power adapter.
No professional installation required — just plug it in and drive.
Real-time traffic data — no waiting for scheduled traffic news updates or random alerts.
Won't interfere with music or news on your FM car radio.
*Traffic services are available only in select cities where coverage exists. A subscription may be required to enable traffic service.
In the Box
GTM 20 FM TMC traffic receiver
Maps for New Regions
Need maps for other regions? See all maps that are compatible with this device.
Need a map update?
Update the maps that came with your device for the best navigation experience.