Garmin GTM 21 Instructions page 4

Note: Heated (metalized) windshields
could degrade the performance of the traffic
receiver.
Service and Subscription
Information
Depending on your region, your traffic
receiver receives traffic data through either
a premium service or a free, public service.
For information about your traffic service
subscription, see the product packaging or
the Traffic settings in the GPS device. The
subscription activates automatically after your
Garmin GPS device acquires satellite signals
while receiving traffic signals from the service
provider.
You can add other FM TMC subscriptions
at any time. Check the Garmin Web site at
www.garmin.com/fmtraffic
services.
Before mounting the traffic receiver, see the Important
Safety and Product Information guide for information
about laws pertaining to windshield mounting
EN–2.
for other available
GTM.21.Instructions