The present invention presents a high tensile strength cold rolled steel sheet having excellent formability, impact resistance and strain age hardening characteristics, and the production thereof. One or more bursts to be transmitted in the downlink to one or more respective devices are aggregated and concatenated into a concatenated burst comprising one or more sub-bursts corresponding to the one or more bursts. An inner shaft freely rotates within the stem. The curvature of the circumferential segments can be defined by a ratio of an inside radius to an outside radius.