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 1-2 weeks and replace the UV Bulb every 4 months or 3,000 hours. Durable, all-weather construction for dependable protection. The DynaTrap XL Mosquito Trap provides up to 4000 meters squared 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.