You can travel with SL throughout the County of Stockholm. The area covers a distance of several kilometres outside the actual city centre and includes all services on the Metro, commuter trains, suburban railways such as the Roslagsbanan, Saltsjöbanan, and the Lidingöbanan trains, and hundreds of bus lines.
Student discount
SL gives a student discount on their subway cards, (also valid for buses and streetcars) which you are entitled to as soon as you are registered at the university. With this travelcard you can make unlimited journeys during the time of validity.