A personal defense device that includes a shield member configured to be worn over at least a third of a length of a user's forearm, the forearm being bounded by the user's ipsilateral wrist and ipsilateral elbow, the length being measured from the wrist to the elbow, the shield member conforming closely to the outer surface counters of a forearm, and a portable source of electricity. The shield member includes an electrical shock bar configured to receive an electrical current from the electrical source and to deliver an electrical shock to a human or other animal.