Sumpol Ultrasonic Pest Repellent - Electronic Pest Control Plug in Pest Repeller for Insect, Mice,Bugs, Roaches, Fleas, Spiders, Mosquitoes (color17) SAFEST PEST CONTROL SOLUTION - Our UPGRADED Indoor Ultrasonic Pest Repeller, Mosquito Repellent, Moth guards ant killer mice repellent with Night Light emits high frequency ultrasonic waves that effectively repel rodents, while being completely inaudible to the human and pets,animal-friendly, and safe for children. LARGE COVERAGE AREA - The Ultrasonic Pest Repellent is effective for an area up to 800~1200 Square Feet. Please note that ultrasonic waves cannot travel through walls,we suggest using at least 1 device for each room, and at least a couple units for areas where pests problems are serious. HUMANE & NON-TOXIC PEST CONTROL - The Ultrasonic Pest Repeller with Night Light is a humane method of pest control, disturbing and driving the rodents away, but not killing them with harsh or toxic chemicals.Unlike glue traps, mousetraps, poisons or roach motels - all of which kill bugs and leave a messy cleanup,while our Pest Repeller minimizes human contact with mice, rats, or other disease-bearing rodents. EASY To USE & COST EFFECTIVE - Simply plug our electronic pest control ultrasonic repellent in the unit and let it do the rest. Please install our items to the socket about 30cm away from the floor.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. 100% MONEY BACK & LIFE TIME GUARANTEE - 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.