DESC: The amazing technology behind the GPS navigation system just got a lot better with the NAV ONE 4500. This GPS navigation system features Real-time traffic information! With an Optional subscription (90 day trial included), you can receive up-to-date traffic information to help you avoid congested roads. You get color-coded speeds and traffic incidents, rerouting around congestion, constantly updating ETA times, and more! It's also easy and convenient to use. You can easily take it from vehicle to vehicle - Just plug 'n go!