Our Canadian made “premium” mouse bait station has 2 entry/exit openings. Mice are drawn to this as mice prefer to eat when they have an escape route from predators. The entry/exit openings are larger to allow for all sizes of mice including field mice. The station comes pre-baited which means you don’t have to handle the bait. The lid is see through so it’s easy to check on how much bait is being consumed. The blister pack packaging keeps the bait fresh.