In 2013, the Tele2 Arena was completed, and was in need of reliable systems that can handle offline transactions. The multi-functional arena is very modern and has an adjustable roof. Tele2 Arena aims to be in the forefront and be as dynamic as possible. This is possible with the OPEN´s system that can be adjusted to according to daily needs. If the requirements change during an event, the cashiers can be moved between restaurants and bars and still be able to reach the right cash clearance at the end of the day. Other vital factors that we at OPEN can offer is our offline functions. Every terminal can store up to 10 000 transactions and run them when the connection returns from offline to online. Our goal is to provide security through our dynamic systems and supply a plan B and guarantee a great event!