Genuine GARMIN accessories. Part Number 010-00722-00.
The GTM 25 is an integrated FM TMC (Traffic Message Channel) traffic receiver, antenna and cigarette lighter adapter. It receives digital information (where available) on traffic and road construction tie-ups and sends it to your compatible Garmin device to offer an alternate route. TMC data gives prompt, accurate notification of accidents, road construction, police or emergency action, etc. — so you can visually monitor traffic flow and, if necessary, avoid traffic tie-ups.
Compatible with the Nuvi Series.