The Dynatrap Ultralight Insect and Mosquito Trap is the perfect size for indoor use. It uses no pesticides or propane and does not make any zapping or buzzing sounds. It has a three-pronged approach to controlling flying pests. First, a UV bulb attracts a wide variety of flying insects, including moths. Second, a special internal titanium dioxide-coated surface, which produces carbon dioxide, attracts mosquitos. Third, when the bugs fly close enough to the Dynatrap, they get drawn into the retaining cage by a very quiet vacuum fan where the bugs dehydrate and perish. A twist-to-close feature prevents any live insects trapped within from escaping when powered off. Keep one by your front or back door, or wherever needed. For outdoor use, place only in a covered, protected area. Protects up to 300 square feet. Powered by a 12V adapter with 6’ cord. Consumes 8 watts. UV Bulb rated for 20,000 hours and is not replaceable. Measures 4.7” diameter, 7.7” height.