2020 Reinforced Ultrasonic Pest Repeller-Our Pest Repeller is the first one who adopts a dual-sounder speaker to repel pests. With intelligently multi-layered frequency bionic wave + Electromagnetic wave + ultrasonic wave triple impact, pests will be forced out of your home.Triple Powers-Press once for light pest infection, Press twice for middle pest infection and press third for severe pest infection. One unit of the ultrasonic pest repellent covers up to 80-120sq.Human and Pets Safe-Using advanced ultrasonic & electromagnetic defender waves of pest control that pass through your walls, can help you drive away spiders, mice, mosquitoes, rats, roaches, ants, snakes without worrying about children or pets. Great for indoor use, such as home, bedroom, living room, kitchen, office, warehouse, hotel, etc.