GTM 10 Professional installation recommended; connects to car antenna/radio
GTM 12 Plug-and-play; integrated antenna; compact design; antenna suction cup mount
GTM 20 Plug-and-play; all-in-one antenna, traffic receiver and cigarette lighter adapter, Americas version
GTM 21 Plug-and-play; all-in-one antenna, traffic receiver and cigarette lighter adapter, European version
Traffic ... what traffic?
Save drive time, gas, and your sanity by adding traffic services to your compatible Garmin with help of the portable GTM 21.
New Compact Design and Easy-to-install Antenna
Similar to the GTM 20, the GTM 21 is an integrated FM TMC (Traffic Message Channel) traffic receiver, antenna and cigarette lighter adapter. Designed exclusively for the European version of certain products, it receives digital information (where available) on traffic and road construction tie-ups that your compatible Garmin unit uses to offer an alternate route. The sleek GTM 21 features a new compact design and includes an antenna suction cup mount — making it easy to install.
Avoid Traffic Tie-ups
TMC data is available in a fast-growing number of cities throughout Western Europe and the U.S., and 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.
Receive Real-time Traffic Data
In most areas, depending on the service provider, TMC traffic broadcasts are continuous — there's no waiting for scheduled traffic news updates or random alerts. With the GTM 21, you see traffic developments in real-time, as they happen, so you can make the right decision sooner. The system alerts you when a traffic problem is on your route and proposes an alternate route to avoid the incident. Because traffic broadcasts are received via a "silent" FM data channel, you can still listen to music or news programming on your car radio without interference from incoming FM traffic data transmissions.
The GTM 21 is a European, portable, all-in-one antenna, traffic receiver, and 12-volt cigarette adapter.
Traffic services are available only in select cities where coverage exists. A subscription may be required to enable traffic capability.
Throughout most of Western Europe, basic TMC data is a free public service, accessible through a number of providers. In France and the UK, premium service requires a subscription. In the U.S., a subscription to the Total Traffic Network is required.
The GTM 21 comes in the configurations listed below. Visit our FM TMC Traffic Service pages to extend your current service or purchase a service plan for an additional area.
For more information on real-time traffic information for your Garmin, see our Traffic web pages.
010-00566-00 GTM 21 (Europe — subscription not required in areas with free service)
010-00566-02 GTM 21 (UK — premium lifetime subscription to Trafficmaster included)
010-00566-03 GTM 21 (France — premium lifetime subscription to v-trafic included)
- GTM 21 Features:
- Portable FM-band traffic receiver
- Plug-and-play; no installation required
- Provides real-time traffic information to compatible Garmin GPS car navigators
- Helps users avoid traffic tie-ups
- Graphical map symbol reference