10 Best Ultrasonic Mice Repellents 2026 in the United States

The BORHOOD Ultrasonic Pest Repellent is a plug-in device designed to keep mice, rats, squirrels, and various insects away from your home or office using sound waves between 25kHz and 65kHz. This wide frequency range helps target different pests effectively without using traps or harmful chemicals, making it a cleaner and more humane option. It works best in open indoor areas like kitchens or basements, but because ultrasonic sound doesn’t pass through walls or furniture, you’ll need one unit per room for good coverage.

The device offers three modes: two quieter settings for daily use and a louder, more intense one for tougher pests, which should be used only when no people or pets are nearby. It’s energy-efficient, using very little power, and easy to operate with a clear LCD screen that shows the active mode. Designed with families in mind, it’s safe around children and most pets (except pet rodents like hamsters). However, it may take a few weeks to see full results, and you might notice more pest activity initially as they move away.

While it doesn’t eliminate pests instantly, this device provides a low-maintenance, safe choice for those looking to reduce indoor pest problems without traps or chemicals.

This ultrasonic pest repellent from BORHOOD offers a humane and energy-efficient way to deter a wide range of pests including mice, rats, squirrels, insects, and spiders. It works within a frequency range of 25kHz to 65kHz, which is broad enough to target various pests effectively. The device is designed for indoor use in open areas like kitchens, basements, and garages, but because ultrasonic waves can't pass through walls or heavy furniture, you’ll likely need one unit per room for full coverage. It plugs into a standard outlet, consuming very little power (3–5 watts), which makes it convenient for continuous use without increasing your electricity bill much.

One of its standout features is the three adjustable modes: two quiet modes for daily use and a louder mode meant for unoccupied spaces when pests are particularly stubborn. This flexibility lets you customize how the device works depending on the situation. The clear LCD display helps you easily see which mode is active and monitor the device’s status. Safety-wise, it’s family and pet-friendly, suitable around dogs, cats, and children, but it’s not recommended if you have pet rodents like hamsters.

The build uses durable ABS plastic, which is sturdy enough for indoor use, though it’s not designed for outdoor exposure. Users should be patient since it can take several weeks (3-4) to notice a significant reduction in pests, and an initial increase in pest activity is normal as they leave their nests. Some users might find the coverage limited for larger or multi-room homes due to ultrasonic wave limitations. This device suits homeowners or office users seeking a low-maintenance, chemical-free pest control option indoors.

The CIIC Ultrasonic Pest & Rodent Mouse Repellent is designed mainly to protect your car's engine from rodents like mice, rats, and squirrels, which can cause expensive wiring damage. It uses ultrasonic sound waves between 18,000 and 36,000 Hz and also flashes bright LED strobe lights to keep pests away without using chemicals or traps. This frequency range is inaudible to humans and safe for pets, making it a family-friendly option.

One of the device’s strong points is its versatile power options—you can use 4 AA batteries, plug it into a USB adapter (5-12V), or connect directly to your vehicle’s power source. This flexibility means it can work in many situations whether your car is parked at home or elsewhere. It also has a handy vibration sensor that detects when your engine is running, automatically putting the unit into standby to save battery life, and then resumes working when the vehicle is off. This smart feature reduces the need for constant battery changes.

The repellent is compact and easy to install with included zip ties, suitable not only for car engines but also for garages, attics, sheds, RVs, and boats. The product appears solid enough for under-hood use, but as with many ultrasonic devices, effectiveness can vary depending on the environment and pest behavior. It offers a good balance of convenience and functionality as a safe, chemical-free way to deter rodents primarily in vehicles and small enclosed areas, though it may not cover large open areas and offers limited customization.