A security device includes: a housing having a plug receptacle; a spool rotatably coupled to the housing; a locking mechanism having a locked state and an unlocked state, the locked state preventing the spool from rotating in a first direction, and the unlocked state allowing rotation of the spool in the first direction and in a second direction; a plug having an inserted position and a removed position with respect to the plug receptacle, the inserted position maintaining the locking mechanism in the locked state, and the removed position allowing alteration of the locking mechanism from the locked state to the unlocked state; a cable coupled to the spool and to the plug; an alarm circuit which activates an alarm upon sensing discontinuity of the cable and/or the plug moving from the inserted position to the removed position, the alarm circuit coupled to and rotating with the spool.