The Dynazap kills mosquitoes, wasps, flies, hornets, yellow jackets and other annoying flying and crawling insects on contact, without leaving behind a smudge or smear. Fully extendable, up to 3' in length, and has a telescopic head that bends in multiple directions for hard-to-reach areas. The Dynazap has a safety switch, and only works when the trigger button is on. Includes 2 AA batteries.