Some people choose to carry less than lethal tools for self-defense. Two less than lethal tools, which are legally available to citizens in certain states, include electronic control devices and stun guns. Some products combine the two devices in one. People use a variety of terms interchangeably to describe these devices but they are quite different. To make an informed decision on whether or not to carry one of these devices, you must first understand what they are and what they do - and more importantly - don't do.