Systems and methods that assist users in the selection of products such as clothing and accessories are provided. A self-sustaining tourniquet is disposed within the housing. Therefore, the system provides that the keys and data remain secure. A centering member of the capsules is housed in the seat, elastically movable in an axial direction and provided with a guide. The drive lever encloses an angle of approximately 90 with the coupling element in a parking position of the windshield wiper and is adjustable about an adjustment axis which extends approximately parallel to the coupling element and intersects the longitudinal axis of the driveshaft, and the coupling element is connected to the link rod via a ball joint.