4-Pack Ultrasonic Insect Repellent Electronic Rat Repellent Insert Indoor repellent for insects, ants, mice, spiders, cockroaches, mice, bugs, mosquit 2022 Update Ultrasonic Pest Repellent Quietly and Effectively Repel Pests - If you're considering a non-chemical approach to pest control, we recommend the Ultrasonic Pest Repeller, which uses ultrasonic frequencies to control pests. These sound waves are designed to disperse, harass and deter common household pests such as mosquitoes, spiders, cockroaches, ants and rodents. Intelligent multi-frequency ultrasonic conversion system, so that pests have nowhere to hide Safe for both people and pets Protect your family in a healthy way Insect repellent is safer than traditional mosquito repellent, the ultrasonic frequency of electronic mosquito repellent is inaudible to humans and pets, eco-friendly, non-toxic, odorless and chemicals, very safe and harmless to children, pregnant women and pets How to Use Mosquito Repellent at Home Ultrasonic repellents are easy to use - just plug the repeller into an outlet and when the blue night light comes on, it will start repelling insects. It is recommended to install this repeller 30-50 inches from the ground for flying insects and 10-30 inches from the ground for crawling pests. And make sure the repeller should be placed in a location where its noise is not affected by walls and furniture EFFECTIVE COVERAGE PROTECT YOUR HOME FROM PESTS - Pest repellent ultrasonic inserts are suitable for areas up to 1600 square feet and are widely used in homes, warehouses, offices, restaurants, supermarkets. Since ultrasonic waves cannot penetrate walls and solid objects, it is recommended that one room and one machine be used After Sales Guarantee Control usually takes 3-4 weeks to get different results depending on the number of pests. If you have any questions, please feel free to contact us. We want you to sleep comfortably and have a pest free environment.