LEMONBEST Powerful Indoor Home Ultrasonic Pest Repeller Best Control Against Rodents Roaches Ants Fleas Mosquitoes Crawling Insects and Spiders With LED Light This machine will have great effect in 50-80 square meters in the room. This machine can lustrate house mouse, black beetle, mosquito, flea, fly, cricket, ant, wood ant etc vermin. The ultrasonic that sent out from this machine is far away from hearing range of human being. Pets and kids friendly; No chemical products; Just plug in, also will not have affect on other house machine. Includes LED indicator light to let you know waves are working, You can adjust the sonic level for mouse andmosquito.