The chemical-free, odor-free way to trap insects, in or out of the house—giving you up to 1/4 acre of coverage! Here's how it works: the clever Dynatrap attracts insects using a UV-emitting light bulb (night or day). It also produces warm carbon dioxide, which mosquitoes can't resist. Then its strong suction fan draws the bugs down and traps them to finish the job. AC power cord. 8" diam. x 10 1/2" h.