Tasers send a pulse with 50,000 volts and a few milliamps. The high voltage ensures that the pulse reaches its target, and the low amperage keeps the Taser from causing any lasting damage.
Tasers differ from stun guns because their electrodes are connected to long, insulated wires that can be fired from the Taser. While tasers can be shot from 20 feet away, standard stun guns must be used at a close range. Tasers send pulse cycles for five seconds before turning off. The shock sends signals through the nervous system and causes pain and contraction in all of the muscles. Most victims fall to the ground and can become temporarily paralyzed when shot.