Tele2 Arena needs reliable systems that can handle offline transactions when the arena was done in June 2013. The multi-functional arena is modern formed and has an adjustable roof. Tele2 arena aims to be in the forefront and be as dynamic as possible. This is possible with OpenSolutions system that can be adjusted to the daily needs. If the needs 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 OpenSolution can offer is Tele2 Arena and our offline functions. Every terminal can store up to 10 000 transactions and run them when the connection returns. Our goal is to provide security through our dynamic systems that contains a plan B, to be able to guarantee a great event!