A wheelchair provides freedom of movement and improves activity. But even with a good technical adjustment it is not always possible for wheelchair users to be mobile with their own arm strength. Inclines, kerbs or thresholds often form unsurmountable obstacles, which is why most O4 wheelchairs can be equipped with various electrical drive systems. They ensure active assistance in moving the wheelchair forward. Barriers are no longer a problem for wheelchair users. These drive systems open up new living spaces and strengthen social inclusion.