A compact joint coupling for a prosthetic brace can maintain a fixed state and can accommodate bending motion of the brace. These devices may be individually tested prior to assembling the electronic module. More particularly, this invention relations to group IB-IIIA-VIA quaternary or pentenary alloys which are suitable for use as semiconductor films. Each of the conductive terminals contains a vertical leg, and the vertical leg bends sideward and forms a bending portion, the bending portion extends upward bends to form a grasping portion. Alternative methods and various systems for distributing mail are also provided. Further, the device can maintain dynamic tilt control mode when data recording is resumed after being suspended, which enables the device to quickly perform tilt control preferred for the current optical pickup location.