This is the latest in clever designs from OakStump. The trap uses a mosquito egg pheromone that mosquitoes use to mark special egg laying places. This has the effect of luring mosquitoes into the trap to lay eggs. Once they have entered the trap they cannot find the exit and end up drowning in the liquid. Easy to wash and re-use, simply purchase additional bait. Each lure lasts 4-5 weeks. Perfect for use around homes and barns. Never go camping without one!