Protect your home from unwanted pests with the Ultrasonic Rodent Repellent Plug-In. This advanced device offers four working modes, including ultrasonic, pressure, and electronic waves, plus an auxiliary flashing light mode, ensuring effective indoor protection. Equipped with 4 ultrasonic speakers and 1 pulse speaker, it effectively repels rats, squirrels, bats, and cockroaches by disrupting their hearing, memory, and nervous system. With 360° full protection and coverage up to 3900 square feet, it's ideal for use in kitchens, garages, attics, basements, and more. Safe for humans and pets, this repellent uses no kills, poisons, traps, or chemicals, with a sound wave frequency range of 25-65KHz. Visible results can be seen in 2-3 weeks, with pests almost disappearing after 4 weeks. The device uses very low power (3-5W) for continued use and prevention of rodent reappearance. Easy to use, simply plug in and select the desired mode for a convenient and effective solution to indoor pest control.