The Garmin GTM 36 Traffic Receiver is a Traffic Message Channel (TMC) receiver module designed for use with Garmin GPS devices. It allows you to receive real-time traffic information, helping you to avoid traffic congestion and find the fastest routes to your destination. The GTM 36 receives traffic data from FM radio stations, providing accurate and up-to-date information on accidents, road closures, and other traffic incidents. With this module, you can receive visual and audible alerts for traffic events along your route, allowing you to make informed decisions and adjust your journey accordingly. The GTM 36 is compatible with a wide range of Garmin GPS devices, making it a convenient and valuable accessory for your navigation system.