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What Type of Traffic Does My zumo 550 Use?
The zumo 550 may receive traffic information from one of two sources:
- a GTM 20 traffic receiver cable, which receives traffic signals from FM radio
- a GXM 30 antenna, which receives traffic signals from a SiriusXM NavWeather subscription
The GTM 20 and GXM 30 are no longer available for purchase from Garmin.