d-Con Refillable Mice Bait Station with 6 Refills. It is a reusable bait station with 2 entry locations for mice placement in corners. It is child and pet tamper resistant. The active ingredient, cholecalciferol, is formulated to encourage repetitive feeding. Safe for pets and can be used indoors and outdoors. Our new formula is 10 x tastier, to mice because it is made with 99 % food grade ingredients. It is so d-LICIOUS that mice will risk their lives for it. The formula does not contain neurotoxins or anti-coagulants. If you have signs of mice (droppings, footprints, gnawing or scampering noises in your walls), place the station where you notice signs of mice activity. You'll be able to see the bait through the station to gauge if mice are eating it or not. Once you notice signs of mice feeding on the baits, mouse activity should cease within a few days. If you don't see chew marks on the bait after a few days, try moving it to another area.