Just plug in Pestcontro Ultrasonic with Floor Light into an electrical outlet and it immediately goes to work to help control your pest problem. Covers up to 2500 Sq. ft. of area -Recommended For Single-Floor Homes Direct Plug-In Electromagnetic Technology to drive pests from the walls where they live and breed Single Speaker Ultrasonic Technology Effective temporary relief from Pests - Rats and Mice Built-In Night Light