This powerful ultrasonic Mosquito and insect repellent is with high technology and quality. It can be widely used in family, warehouse, shops, hotels, hospitals, offices, rooms, gardens, hotels, grain depot, etc. It emits ultrasonic waves of constantly Changing Ultrasonic Signals to repel rats, mice, small rodents, mosquitoes, Cockroach, ants, spiders, fleas and many other insects.