This travel size trap attracts and kills mosquitos and other nuisance flying insects including biting flies, wasps, stink bugs and Asian beetles. Use outdoors only in a covered, protected area like a garage, screened-in porch or four-seasons room. No pesticides. A UV fluorescent bulb generates a warm light, attracting insects. An exclusive titanium dioxide coated surface produces CO2 that attracts insects. A powerful but quiet vacuum fan sucks insects into the retaining cage.