The Streetwise stun gun is a self defense device which disrupts the message the brain sends to the voluntary muscles. Simply touching an attacker with a stun gun for three to five seconds will deliver a high voltage shock causing loss of balance and muscle control, confusion, and disorientation bringing him to his knees and making him incapable of further aggressive activity. Full recovery takes about five to ten minutes and there is no permanent harm. Requires three 9 volt batteries. Streetwise brand stun guns have more features than any other stun gun on the market. World’s Strongest Stun Gun: at 1,000,000 volts, this is the highest voltage stun gun available.