Protect Home Express controls house mice via a bait contained inside the supplied box. The bait agent is comprised of a paste with the active ingredient alpha chloralose, and must be placed in areas where mice gnaw at or forage for food. The paste is very attractive to mice due to its high-fat content. For safety, children and pets cannot open the bait box. Product Features: Effective within 24 hours bait box sufficient for 50 miceHassle-free controlApplication advice:Before placing the bait boxes, check that no other alternative food sources are available for the mice.