Ultrasonic repeller uses the advanced technology, which can produce frequency conversion ultrasonic wave to affect auditory and nervous system of mice, mosquitoes, cockroaches and other pests and cause neurological disorder, loss of inappetence and mental fatigue, thus fleeing the scene. It can be widely use in families, hotels, restaurants, warehouses, supermarkets, offices and more. Features: Ultrasonic repeller is mainly used to repel mice, mosquitoes, cockroaches, spiders, ants, flies and so on. It produces ultrasonic wave to affect auditory and nervous system of mice, mosquitoes and pests to make them flee the scene. With night light function, 2 levels of brightness adjustable, soft and warm light brings you a comfortable night. Plug-in type, lightweight and portable, it can be widely applied in families, hotels, restaurants, warehouses, supermarkets, offices and other places. No sound, no chemicals, no poisons and odorless, safe to both mothers and babies, 15-30m² effective