Product Features: UK plug or EU plug UltrasonicTechnology: The Ultrasonic Pest Repeller use the dual ultrasonic and electromagnetic chips work simultaneously to disorientate the hearing and nervous system of pests to quickly and powerfully drive away most types of pest like mice, mouses, ants, mosquitoes, spiders, cockroaches etc. More Safe for Child Pets: Our pest repeller is safer than traditional mosquito repellents. Ultrasonic sound is inaudible to humans and household pets, alternative to dangerous poisons and Sprayers, chemicals and traps, no bad smell and Corpses. Large Effective Coverage: The Insect Rodent Repeller is effective in an indoor area up to 1200 sq. ft. It is widely used in homes, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. Please make sure there are no barriers like curtains or cabinets covering in front of the repellent. Easy to use: Just plug the electronic pest control ultrasonic repellent in power sockets. This time the machine began to work when the blue light on. Most customers can see the results within 3-4 weeks Then we can say goodbye to pest and mice Week 1: Pest repeller starts working, and pests will feel discomfort. Week 2:Pest repeller keeps working, and pests will feel anxiety. Week 3:Pest repeller works effective, pests will begin to escape from their shelters. Week 4:You can be in a pest-free space. Package Includes 4 Pack Ultrasonic Pest Killer Repeller