Bell and Howell Pest Repeller with Extra Outlet & Night Light Fast and Effective - Ultrasonic Sounds Waves Combined with Electromagnetic Waves to Help Repel Repels: Mice, Rats, Ants, Spiders, and Roaches No Harmul Chemicals - Odor Free Designed to Repel Pests Behind Walls...Where Pests Eat and Nest. Auxiliary Outlet & LED Light Built Into the Unit for Added Convenience