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.