Real time traffic alerts for Garmin GPS units. (No subscription to pay ever). Check Garmin compatibility list: https://buy.garmin.com/en-CA/CA/p/14994#devices https://www.amazon.ca/Garmin-Traffic-Receiver-Discontinued-Manufacturer/dp/B001MU246A https://buy.garmin.com/en-CA/CA/p/14994 If you are going on a trip or RVing, this is essential to save time and gas, enabling you to avoid traffic jams and take alternative routes. Pays for itself on first trip. Absolute bargain, only $40. Thanks