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. Please note that due to manual measurement and display differences, there may be slight differences between the individual products and the photos.