Adopts ultrasonic technology which can affect the pest’s auditory and nervous system to keep them away from your home. Safe without radiation, harmless, odorless to humans and pets, does not interfere not with home appliances. Humans and pets can’t hear the ultrasonic frequency, so it’s a quiet insect repeller. Plug pest repeller into the wall charger, the effective area up to 80 meters squares. Repel mice, mosquitoes, ants, rats, cockroaches, spiders, rodents, bedbugs, flies, fleas and other insects. Suitable for living room, kitchen, bedroom, bathroom, workshop, garage, warehouse, parking lot, etc.