The Streetwise 800K Stun Baton is a self defense device which disrupts the message the brain sends to the voluntary muscles. As the bright electric current pulsates between the test prongs and creates an intimidating electrical sound an attacker with any sense at all will be stopped in his tracks. Measures 18 in. long. Includes a heavy duty holster with belt loop for easy carrying. Requires 4 CR123A (3 volt) batteries—not included. One Year Warranty