Ultrasonic Plug-In Pest Repeller (2-Pack) Deterrent for Mice, Bats, Rats, Ants, Spiders, Mosquitos, Roaches and More Effective removal of pests such as mice, bats, rats, ants, spiders, mosquitoes, roaches, and flies. Plug into a power outlet for a constant deterrent of insects and rodents in household rooms and attics. Dual band settings for optimum performance up to 2100 square feet in rooms with unobstructed view. Repels stubborn pests without the use of toxic chemicals or dangerous pesticides. 2 units included with built in switchable night light to use in multiple locations throughout your home.