The Goodnature® Rat & Mouse Trap automatically kills 24 rats or mice - one after the other, before you need to replace the gas canister. It uses non-toxic lures and kills pests instantly and humanely. It comes with a Digital Strike Counter which lets you know how many rats or mice have been killed. The trap comes with a trap mount which is easily attached to a tree trunk or wooden post. If your rodent problem is indoors, or you want to move the trap around more easily, you can add a Trap Stand.