Safe and Eco-Friendly---No poisons, traps, chemicals and killing needed as the insect repellent is 100% safe and harmless to humans, children and pets. The ultrasonic sound is inaudible to humans and pets, no noise, no radiation, and pregnant women and babies can use it with confidence. Lightweight design and easy to use- --The ultrasonic pest repeller is portable and easy to install, just plug it into power outlets and make sure there are no barriers like curtains or cabinets covering in front of the repeller. The spider remover plug-in works automatically and should take a few days to work effectively. Variety of Uses and Full Coverage---Widely used in home, warehouse, office, garden , hotel, etc. Energy saving, protect you from pest intrusions all day long without worrying about your bill. Since ultrasonic cannot penetrate through walls and solid objects, it is recommended to put at least one pest repellent in a room. Advanced pest control technology---The insect repellent Ultrasonic is equipped with the latest ultrasonic physical technology and heat dissipation system. This mouse repellent emits different frequencies of ultrasonic waves to irritate the nervous system of various pests such as rats, mosquitoes, ants, cockroaches, spiders and more. Excellent after-service sale---Please note you may see results within 2-4 weeks, it is normal to see pests increase in the first 2 weeks as they are repelled from their home. Reduction in pest activity should occur within 2-3 weeks. If you have any questions, please contact us directly, we will help you solve them. Product Description Features Our pest repeller applies the latest technology ultrasonic to extremely irritate the hearing and nervous system of pests and rodents, to make them uncomfortable, which keeps them away from your house and dare not enter your house again. This pest control can be used anywhere in the house, such as kitchens, bedrooms, basements, garages, warehouses, etc., to achieve better effect, it would be better to place one device in each room and avoid carpets, curtains and mounting hardware around the unit. Just plug in the outlet and the product will be in normal working condition, no more chemicals, no insecticides , no poisons, without eliminating any insects or rodents, leaving no mess to clean up, your home will not have strong odors.