Ultrasonic Insect Repellent, 2 PCS Mouse Repellent Versatile Occasions Anti Rats Ultrasonic mouse repellent emits high frequency ultrasonic waves which effectively repel rodents.When installing the device, there must be no obstacles in the immediate vicinity. Ultrasound can disturb and irritate the nervous system of insects, making them uncomfortable. Eventually drives them out of their home.Safe and Environmentally Friendly Without poisons, chemicals, traps and without killings, It is a physical method to drive away pests, non-toxic, environmentally friendly and absolutely safe for children and pets, a pest control combining advanced technology and humane.Easy Installation and UsePlace ultrasonic mouse repeller 20-100cm from the ground, Just plug in our ultrasonic mouse repeller and it will do the rest.Note: The data is all measured manually, please allow 1-3cm error, due to of the light and display difference, there will be a certain color difference, the actual object received shall prevail.