Pest Repeller, Set of 2 Ultrasonic Pest Control Repellent Reject Plug In for Insects, Spiders, Mice, Roaches, Bugs, Fleas, Ants and Mosquitoes HIGH EFFICIENT PEST REPELLER: The advanced biological ultrasound technology, intelligent frequency conversion launch 25KHz-65KHz wavelength, stimulate the pests feel uncomfortable, quickly fled home. Comprehensive elimination of bacterial and viral infections, protection of family health. ENVIRONMENT FRIENDLY PEST REPELLER: Protect your home from unwanted pests without using dangerous chemicals, sprays or traps that can harm you, your family, your plants and animals.Pest Control Ultrasonic Repellent uses safe & effective technology to rid those nasty pest from your home. Works for Rats, Mice, Ants, Roaches, Spiders, Bugs, Fleas, Bats and much more. EASY TO USE PEST CONTROL: Simply plug electronic pest control mouse repellent in the unit and let it do the rest. Use 1 unit per average-sized room with a pest problem. Additional units will be required in larger areas. Areas such as attics, basements, garages and large storage areas may require more than one unit. Perfect Accessory for Indoor Rodent Control. LARGE COVERAGE AREA PEST REPELLENT: The electronic pest control repellent is effective for an area up to 100 - 150 Square Feet. Please note that ultrasonic waves cant travel through walls. Though our unit works very well, if you have a large infestation, we recommend placing our insect repellent in every room! 100% LIFETIME WARRANTY FOR PEST REPELLER: Our Ultrasonic Pest Control Repeller is backed by our Lifetime guarantee because we want to help you get rid of those pests. Typical results can take 3-4 weeks depending on the amount of infestation. We offer a 100% money back guarantee if you don't see results after 4 weeks.