The reusable yellowjacket trap catches all major species of yellowjackets common to north america. The attractant replicates the sex pheromone of the yellowjackets to draw them inside the trap where they die naturally - no poisons or killing agents. The attractant lasts for weeks without daily maintenance. Refills are available, including the 4 week 2 pack and the 10-week attractant cartridge for even longer lasting performance.