General description Using the latest dual chip technology, the 4-Pack Ultrasonic Mouse and Rat Repellent emits ultrasonic waves of varying frequencies to effectively deter mice, spiders, cockroaches, mosquitoes, and other insects. This odorless and silent device is designed to be extremely unpleasant for pests while remaining safe for humans and pets. The pack includes four units for comprehensive coverage. Technical specifications Effective range: up to 111.5 m² Installation height: recommended 80-100 cm above the ground Power consumption: low Installation Simply plug the device vertically into a power outlet. When the blue light illuminates, the product is operational. Usage For optimal results, place an ultrasonic repellent in every room. Ultrasonic pest control typically takes 3 to 4 weeks to show varying results based on the level of infestation. Other information Safe and harmless: non-toxic, chemical-free, and radiation-free. Versatile applications: suitable for homes,