Mosquitoes, roaches, rats and even the cutest mice are not exactly the idea of a house pet. Get rid of these house pests with a Riddex Plus Digital Pest Repeller! The Riddex Plus Plug-In Digital Pest Repeller Unit actually changes the normal field around your wiring, creating an environment that aids in the control of pests. One unit takes care of a normal sized home, approximately 2000 square feet. Use two units if the house is more than one story. Obvious pest-free results can be seen within a short 2-3 weeks!