Advanced Ultrasonic TechnologyThe ultrasonic pest repeller uses the latest ultrasonic physical technology and heat dissipation system. By emitting disorientating pulses, it directly affects the pests' nerve hearing and immunity, effectively repelling rats and other pests. 100% Safe & No Harm to HumanPest Ultrasonic Insect Repellent is harmless and non-toxic to humans and pets. The pest repeller does not contain chemicals, non-toxic, odourless, silent and radiation-free. You don't have to worry that the Pest Ultrasonic Mouse Repeller will cause harm to babies or pets. In addition, the mouse repeller uses sound waves to repel pests and will not kill them. Wide CoverageThe upgraded ultrasonic pest repeller is equipped with a dual-chip system, which can effectively repel pests in an area of up to 1600 square metres. Since ultrasonic waves cannot penetrate walls and solid objects, its recommended to place at least one repeller in a room for best results after 3-4 weeks. Suitable indoor locations for this plug-in ultrasonic pest repeller are: homes, garages, offices, companies, restaurants, warehouses, etc. Quiet and & Easy to UseThe Ultrasonic Pest Repeller works with low-frequency ultrasonic waves, which means it provides you with extremely quiet pest control that won't disturb you or your pets. Simply plug this pest repeller into an outlet and hold it perpendicular to the ground for 30-80 cm. Effective for All PestsThe electronic ultrasonic pest repeller can help you get rid of mice, mosquitoes, spiders, bugs, ants, flies, cockroaches, fleas and other pests in your home. When you first start using it, some pests may bustle around and appear anytime, anywhere, please don't worry. As pests are affected by the ultrasonic waves, they will scramble out to find a new habitat.