Provided is a knee brace configured to be easily adjustable to conform to the size of the wearer’s limb. The main valve opens a fluid connection between an inflow opening and a discharge opening through a connecting channel in an open position and blocks the channel in a closed position. When transferring information from the platform to the application processing unit, a single interface unit transfers it in a constant data format. This invention also relates in part to reaction mixtures containing one or more substituted or unsubstituted alkenols as principal reaction products. The display controller can be coupled to the display device and the sensing device, and can be configured to modify image display by the display device, in response to one or more of the interactions that are sensed. The user interface client receives and reproduces the multimedia data so that a user interface may be displayed to which a variety of effect are applied considering individual characteristics of the user interface client such as performance of the user interface client and user preference.