General description The Pack Ultrasonic Pest Repeller effectively repels a variety of rodents and insects, including mice, spiders, cockroaches, flies, mosquitoes, bedbugs, and ants, using ultrasonic waves that create an unbearable environment for these pests. It is safe for humans, children, and pets. Technical specifications Coverage area: 800-1200 square feet Recommended installation height: 20-80 cm above the ground Installation Simply hold the insect repellent upright and plug it into a socket to activate it. When the blue light turns on, the device is operational. Usage Most users report satisfactory results within 3-4 weeks of use. Initial activity of pests may increase as they are disturbed by the ultrasonic waves.