Hoont Indoor Plug-in Ultrasonic Pest Repeller with Night Light - Pack of 4 - Eliminate All Types of Insects and Rodents PACK OF 4  Package includes 4 Hoont&#8482; Indoor Ultrasonic Pest Repellers. Great economic pest solution. Place one at each room or area where you are experiencing a pest problem. ELIMINATES ALL TYPES OF RODENTS & INSECTS  Protect your home from unwanted pests without using dangerous chemicals, sprays or traps that can harm you, your family, your plants and animals. Works for Rats, Mice, Ants, Roaches, Spiders, Bugs, Fleas, Bats and much more / Very easy to use; simply plug the device into your socket and watch your home become completely free of all pests, rodents and insects. No messy chemicals or pesticides, no traps and completely silent for humans and home pets. / Since waves are inaudible to humans, it features a LED indicator light to let you know waves are working. MULTI- FREQUENCY ULTRASONIC WAVES - The Hoont&#8482; Indoor Ultrasonic Pest Repeller features a mix of highly-effective ultrasonic frequencies, being extremely irritating to rodents and insects thus causing them to scramble to find a peaceful area, and will be forced to leave your home. The variable technology frequency waves ensure that pests do not get immune to the sounds. With these sounds not letting up all rodents and insects will be forced to leave your home. Your home will be free of all insects and rodents! EFFECTIVE & ENVIRONMENTALLY FRIENDLY The Hoont&#8482; Indoor Ultrasonic Pest Repeller is extremely effective in ridding your home from all insects and rodents, and will protect your home and family from having annoying pests constantly trying to take shelter in your home. COVERAGE AREA - The Hoont&#8482; Indoor Ultrasonic Pest Repeller is effective for an area up to 350 Sq. Ft. per unit. However ultrasonic sound cannot go around corners or penetrate hard surfaces like furniture, cabinets, walls, or ceilings. You will need one unit for each room where you have a rodent or insect problem. / Features also a soothing blue LED night light with on/off switch.