STUN MASTER is one of the most recognizable names in the stun gun industry and has been manufacturing and distributing self defense products since 1994. STUN MASTER has been able to maintain a high level of success for many years despite the highly competitive nature of the personal defense field. Most of the STUN MASTER stun guns utilize two 9 volt alkaline batteries except for the 100,000 volt gun that only requires one. All STUN MASTER stun guns come with a lifetime warranty. STUN GUNS store a high voltage, low amperage charge that will disable an attacker by instantaneously discharging into the attacker's body. This rapid discharge of energy is absorbed by the attacker's muscles and almost immediately depletes the attacker's blood sugar by converting it into lactic acid. This causes an intertuption of the nerve impulses that control the muscle's movement. The attacker's nervous system becomes overwhelmed by random nerve impulses and causes the attacker to lose control of his balance and disables him temporarily. If the attacker is touching you, the electrical charge WILL NOT flow into your body.