?? This handy little 80,000 volt stun flashlight is also a 130 db alarm. ?? The body is made of fiberglass reinforced plastic. ?? Uses one 9-volt alkaline battery. ?? 8 inches long Compact size and 80,000 powerful stopping volts makes this a favorite among security gaurds, joggers, students and people who travel often, easy to conceal, looks like an ordinary flashlight, great gift, very durable.