You need to register first. After that you can log into the ticket shop and redeem your voucher code. You will then receive your personalized eticket which gives you direct access on site and thus reduces the waiting time.
Each voucher matches a certain type of entrance ticket, i.e. there are different vouchers, for instance, for day tickets and multi-day tickets. There is a note on your voucher, indicating the type of ticket you will receive.
After completing the order process, you can download and print out your entrance tickets. They will also be sent to the email address you gave us.