A Taser or conducted electrical weapon (CEW) is an electroshock weapon sold by Taser International. It fires two small dart-like electrodes, which stay connected to the main unit by conductors, to deliver electric current to disrupt voluntary control of muscles causing “neuromuscular incapacitation”. Someone struck by a Taser experiences extreme pain and over-stimulation of sensory nerves and motor nerves, resulting in strong involuntary muscle contractions. Tasers will incapacitate, not just cause pain compliance, and are thus preferred by some law enforcement over non-Taser stun guns and other electronic control weapons, which, like a Taser when used solely in “Drive Stun” mode, can only do the latter. (source)