General description The 6pcs Ultrasonic Pest Repeller is designed to effectively repel a variety of rodents and insects, including mice, spiders, cockroaches, flies, mosquitoes, bugs, ants, and more. Utilizing ultrasonic waves, it creates an uncomfortable environment for these pests without causing any harm to humans, children, or pets. Technical specifications Coverage area: 800-1200 square feet Recommended installation height: 20-80 cm above the ground Installation Simply hold the device vertically and plug it into a socket to activate. The blue light indicates that the device is operational. Usage Most users report satisfactory results within 3-4 weeks of use. Initial activity of pests may increase as they flee their hiding places due to the ultrasonic waves.