If you have an extra-large mosquito or flying insect problem, the DynaTrap XL Mosquito and Insect Trap delivers three layers of powerful protection. First, a UV fluorescent bulb generates a warm light, attracting insects. Then a second lure, an exclusive Ti02 titanium dioxide-coated surface, produces CO2 that's irresistible to mosquitoes. Third, a powerful yet whisper-quiet vacuum fan sucks insects into the retaining cage where they dehydrate and die. Empty the retaining cage every 1-2 weeks and replace the UV Bulb every 4 months or 3000 hours. Durable, all-weather construction for dependable protection. The DynaTrap XL Mosquito and Insect Trap provides up to 1 acre of effective coverage. To maximize your coverage, the trap can be placed on a flat surface or hung from a hook.