With a repelling range of up to 4,000sq feet, the Indoor Repeller targets rats, mice, spiders, cockroaches, ants and other crawling insects, wherever they may be. It is dual action, emitting ultrasonic sound waves which are completely undetectable to the human ear, irritating and confusing the pests, repelling them from their hiding places and discouraging them from entering your home. It can also safely send electromagnetic pulses through the wiring of your house, ensuring the Repeller can reach every nook and cranny of the walls in your house. The unit's speaker is powerful, despite it's slimline design. In line with the contemporary feel, it also displays smart, soft LED lights, which light up when the repeller is working, enabling you to differentiate between its various settings. Simple to operate (instructions are included), this is a simple, humane, and mess free solution to household pests, safe for both pets and children alike. Safe for use around: pregnant women, children, birds, fish, lizards, dogs and cats.