The Garmin GTM 36 Traffic Receiver is a GPS Traffic Message Channel (TMC) receiver module that provides real-time traffic updates to compatible Garmin GPS devices. It receives traffic data from FM radio stations and delivers it to your GPS device, allowing you to avoid traffic congestion and plan your routes more efficiently. The GTM 36 features a built-in antenna and is easy to install. With this receiver module, you can stay informed about traffic conditions and make smarter driving decisions for a stress-free journey.