The Victor Catch & Hold Mouse Trap allows a catch and release system so mice can run free elsewhere. To use, simply bait with a small amount of peanut butter in the inside bait chamber of the trap and place where mice roam in the house. Once you have a catch, simply open the secured lid and let the mice out. Be sure to check with your local wildlife centers to abide by the laws in your area. Due to the design, this plastic trap is ideal for use indoors and outdoors. Typically, mice like to travel along the walls rather than out in the open, so we recommend setting the trap up against a wall. Try placing the Catch & Hold Mouse Trap in your living room, kitchen, attic, basement, or other areas where mice tend to frequent. Remember, this trap catches up to 4 mice per setting which is ideal when dealing with a family of mice in your home.