Effective and humane mouse/rat cage. Pack of 4 (each trap is 9.5 x 5.5 x 4.5 in).Easy to use. Simply place some food inside the trap. A mouse that tries to retrieve it will trigger the spring-loaded trap door to close behind it.Humane pest control. Release trapped mice back into the wild, on your pesky neighbor’s property, or keep them as pets. (Just kidding). Really, it is up to you.Keep it simple. The simple design is easy to troubleshoot and doesn’t require expensive, specialized bait.