Features: Applied to repel mice, mosquitoes, cockroaches, spiders, ants, bugs and other pests. Widely applied in houses, hotels, restaurants, warehouses, supermarkets, hospital, offices and other places. It produces ultrasonic wave to affect auditory and nervous system of mice and pests to make them flee the scene. 80-120 square meters large coverage area in open environment. Chemical free, no dead rodents, no insecticides, no traps, no poisons. Warning: 1. Do not use in rooms with rodent pets. 2. Not intended for outdoor use.