【Advanced Ultrasonic Pest Control】This set of four ultrasonic pest repellents uses advanced frequency conversion, bionic sound technology, and a wide frequency range to disrupt pests' nervous systems, causing discomfort and driving them away. Effectively deters pests such as mice, rats, mosquitoes, flies, cockroaches, ants, bed bugs, and more. 【Safe for Families & Pets】Our pest repellents offer a safe, chemical-free way to control pests. Non-toxic and odorless technology is designed to protect your home without compromising the safety of your family and pets, making it ideal for homes with children or animals. 【Easy to Use & Maintenance Free】Simply plug the device into any standard electrical outlet and it will start working immediately. The simple design is maintenance-free, offering an easy and effective solution for bedrooms, offices, and other living spaces. 【360° Wide Area Pest Protection】Each repeller covers an area of up to 1600 square feet, ensuring 360° protection with dual