A stun gun is a non-lethal self-defense weapon that discharges an electric shock to incapacitate an attacker. There are several synonyms for a stun gun, including electric stun device, electroshock weapon, shocker, and taser. A stun device typically has two metal prongs that emit an electrical charge when they come into contact with an attacker's skin. These prongs are connected to a battery-operated control unit that delivers the charge. Some synonyms, like taser, refer to specific brands of stun guns with unique features, such as the ability to shoot probes from a distance. Regardless of the name, stun guns are an effective tool for self-defense and personal safety.