If you have an extra-large mosquito problem, the DynaTrap XL Mosquito Trap delivers several layers of powerful protection. First, a UV fluorescent bulb generates a warm light, attracting mosquitoes. Then, a powerful yet whisper-quiet vacuum fan sucks them into the retaining cage where they dehydrate and die. Empty the retaining cage every 1 to 2 weeks and replace the UV bulb every 4 months or approximately 3,000 hours (replacement bulb sold separately). This trap features durable, all-weather construction for dependable protection. The DynaTrap XL Mosquito Trap provides up to 4,000 sq. m. of effective coverage, without the use of zapping- making it the ideal choice for your home. To maximize your coverage, the trap can be placed on a flat surface or hung from a hook.