Safe for Humans/PetsRat repellent ultrasonic DON'T contain toxic ingredients or chemicals; no traps, no killing, no harm to humans/pregnant women/babies and pets. It is safer, fast, cheaper and more durable than those expensive pest control drugs and other pest control methods. Easy to use Mouse repeller plug in just simply to plug it in and then start to work, unique automatic frequency conversion function, 3 sections of sound waves 3D surround, ultrasonic frequency from 50 to 60HZ, power 5W, drive away the mosquitoes, flies, cockroaches, spiders, ants, mice and other pests and small animals,fast & effectively. Silent DesignMice repellent ultrasonic is silent while working, no worry about disturbing your sleep even if you have small babies and elderly at home, providing you with a quiet and disturbance-free space! Energy Saving & Fire ProtectionPower consumption is less than 5W, monthly power consumption is almost negligible.Rodent repeller plug in can work 24 hours for best results, made of high quality ABS flame retardant material, safe and reliable! Effective CoveragePest repeller can be used in a variety of places where bait or insecticide cannot be used, such as bedrooms, bathrooms, offices, nurseries, supermarkets, furniture shops, etc. Effective area is up to 900 square feet.