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, n not interfere with household appliances. Humans and pets can’t hear the ultrasonic frequency, so it’s a silent insect repeller. Plug pest repeller into the wall charger, the effective area up to 80-120 square meters. 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.