This trap attracts and kills mosquitoes in yards up to one acre without harmful chemicals. The trap mimics the natural conditions of human habitation by emitting heat and odorless carbon dioxide (the same gas people expel during respiration) and light to lure mosquitoes. Carbon dioxide is generated when ultraviolet rays from two fluorescent bulbs react with a titanium dioxide coating inside the trap. When the mosquitoes are drawn inside the device, an integrated fan traps the insects and sends them to a removable net where they die of dehydration. Unlike propane mosquito trap systems that require frequent refills or electrocution traps that release pathogens when an insect is killed, this superior model uses 3,000-hour rated UV bulbs and does not create harmful biological agents. AC plug. 22" H x 13" Diam. (8 lbs.)