A stun baton is a self defense device which disrupts the message the brain sends to the voluntary muscles. Simply touching an attacker with the stun baton 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. At 500,000 this is the strongest baton on the market. It measures 20 inches long so it will keep you at a safe distance from your attacker. The end of the baton will also shock the attacker if he attempts to grab it. Designed without a safety switch for quick use. Requires two 9 volt batteries.