The card is a mobile/digital card that is activated in the app My Camping Key. When your booking has been administrated a text message and an email will be sent to you with your card number and further instructions how to download and activate your mobile Camping Key Europe.
Many campsites that are affiliated to SCR Svensk Camping also sell the card via their own homepages. If you buy the card on line via Camping.se or a campsite homepage, it will be valid for 12 months from the purchase date (to the end of the 12th month).
Alternatively, you can buy the card in the reception on arrival. You don't need to check in to buy the card. If you buy the card at a campsite, it is normally valid from the purchase date up to and including 31 December of the current year.