EASY TO USE: Pest Killer Ultrasonic Plugs into the Power Outlet; Ultrasonic Bug Repeller activates when the blue light is on, repels multiple pests, mice, fleas, ants, mosquitos, flies, spiders, cockroaches, bugs, rodents and insects. Wide effective coverage area: The mosquito repellent effective area is up to 1600 square meters; since ultrasonic waves cannot penetrate walls and solid objects, please put one repeller in each room, 6-12 units are enough to resist pest control in the house (depending on depending on the severity of the pest infestation). QUIET AND EFFECTIVE: Ultrasonic Bug Repellent is suitable for low-frequency ultrasound, which is difficult for humans to hear. But it's very effective against rodents and vermin, the ultrasound gets them out of your home fast! The principle of the ultrasonic insect repellent: through low-frequency ultrasonic waves, stimulate the brain and auditory nervous system of mice and pests, effectively repel most types of pests. LESS POWER CONSUMPTION: Keep you away from cleaning pests, odors, and dead bodies with the plug-in pest control that requires no batteries and saves a lot of money. Power supply voltage: 110~220V Power consumption: less than 2.5W Frequency range: 22~55KHZ