A safety pen needle assembly (12, 110) comprising: a hub (30, 126); a needle cannula (20, 114) cooperating with the hub, the needle cannula having a distal end for insertion into a patient, and a proximal end extending into the hub; a sleeve (14, 146) surrounding the hub and needle cannula; a shield including a window (18, 118), the shield surrounding the sleeve and movable relative to the sleeve from a first position where the sleeve encloses the needle cannula and hub, to a second position where the needle cannula extends beyond the hub and the sleeve; a locking mechanism that engages the shield to the hub to prevent further use of the needle cannula; and a spring urging the shield; characterized in that the safety pen needle assembly (12, 110) further comprises: the shield being-movable relative to the sleeve to a third position where the distal end of the needle cannula is partially surrounded by the sleeve and the hub encloses the needle cannula; the spring urging the shield to move relative to the sleeve from the second position where the spring is compressed to the third position; and a smart ring having electrical contacts or sensors that determine two or more of a position of the shield, needle insertion and needle exposure time, needle insertion rate and needle exposure rate, the number of injections performed, time intervals between injections or the number of needles used or available for injection; wherein the window indicates needle cannula exposure via an indicia on the hub and safety activation via the locking mechanism. a hub (30, 126); a needle cannula (20, 114) cooperating with the hub, the needle cannula having a distal end for insertion into a patient, and a proximal end extending into the hub; a sleeve (14, 146) surrounding the hub and needle cannula; a shield including a window (18, 118), the shield surrounding the sleeve and movable relative to the sleeve from a first position where the sleeve encloses the needle cannula and hub, to a second position where the needle cannula extends beyond the hub and the sleeve; a locking mechanism that engages the shield to the hub to prevent further use of the needle cannula; and a spring urging the shield; characterized in that the safety pen needle assembly (12, 110) further comprises: the shield being-movable relative to the sleeve to a third position where the distal end of the needle cannula is partially surrounded by the sleeve and the hub encloses the needle cannula; the spring urging the shield to move relative to the sleeve from the second position where the spring is compressed to the third position; and a smart ring having electrical contacts or sensors that determine two or more of a position of the shield, needle insertion and needle exposure time, needle insertion rate and needle exposure rate, the number of injections performed, time intervals between injections or the number of needles used or available for injection; wherein the window indicates needle cannula exposure via an indicia on the hub and safety activation via the locking mechanism. the shield being-movable relative to the sleeve to a third position where the distal end of the needle cannula is partially surrounded by the sleeve and the hub encloses the needle cannula; the spring urging the shield to move relative to the sleeve from the second position where the spring is compressed to the third position; and a smart ring having electrical contacts or sensors that determine two or more of a position of the shield, needle insertion and needle exposure time, needle insertion rate and needle exposure rate, the number of injections performed, time intervals between injections or the number of needles used or available for injection; wherein the window indicates needle cannula exposure via an indicia on the hub and safety activation via the locking mechanism.