How ultrasonic pest control works
How RODAR® II helps make pest-prone spaces less inviting.
RODAR® II emits high-frequency ultrasonic sound designed to help discourage rats, mice, bats, squirrels, fleas, roaches, and other unwanted pests from settling in.
Plug it into an enclosed indoor space, aim the front of the unit toward the problem area, and let it run continuously. No bait to place. No traps to set. No chemical spray released by the device.
The simple idea
Use sound pests notice, in places people want protected.
RODAR® II uses ultrasonic sound: high-frequency sound above the normal hearing range of people. Many pests can detect these frequencies, and the protected area becomes less comfortable for them to use as a shelter, pathway, or nesting space.
No bait. No spray. No trap reset.
It does not chase pests with chemicals. It changes the environment around them.
That difference matters. RODAR® II is designed to run quietly and continuously in the background while the space becomes harder for pests to tolerate. The best results come from pairing ultrasonic coverage with basic prevention: remove food, reduce clutter, block entry points, and keep the front of the unit unobstructed.
High-frequency output
RODAR® II emits ultrasound in the 23–55 kHz range from a powerful internal transducer.
Open-air coverage
Ultrasonic sound travels through open air and reflects off hard surfaces, but walls, doors, boxes, furniture, and cabinets can block or reduce coverage.
Continuous deterrence
Leaving the unit on helps keep the protected area less comfortable for pests over time.
Find the activity.
Start where signs are visible: droppings, scratching sounds, nesting material, food damage, gnaw marks, traffic paths, or suspected entry areas.
Plug it in nearby.
Use RODAR® II in the same enclosed area whenever possible. The closer the unit is to the problem space, the more direct the ultrasonic coverage can be.
Aim the front clearly.
Point the sound face toward open room space, rafters, corners, travel paths, or suspected entry points. Avoid hiding it behind stored items.
Leave it running.
Keep the unit plugged in so ultrasonic coverage remains active while sanitation, sealing, and clutter reduction make the space less attractive.
Placement matters
Ultrasound works through open air, not through walls.
Good placement is the difference between a unit that is simply plugged in and a unit that is actually aimed at the problem.
Give the sound a clear path.
RODAR® II should face the open area where pests are active or likely to travel. For divided floor plans, closed rooms, packed storage areas, or multiple problem zones, additional units may be needed.
RODAR® II
Place or mount the unit where the front can face the problem area without obstruction.
Unwanted pests
The protected area becomes less comfortable for many pests to settle into.
Rodents Bats Squirrels Crawling pestsAim across the space.
Point RODAR® II toward open room space, rafters, storage rows, suspected pathways, or entry areas. Do not point it into a wall, cabinet, curtain, or stack of boxes.
Keep it uncovered.
Ultrasonic sound needs room to move. Avoid placing the unit behind furniture, appliances, doors, heavy shelving, or deep storage clutter.
Add coverage where needed.
One unit can cover up to 3,000 square feet under favorable conditions. Separate rooms, blocked paths, and multiple pest zones may call for more than one unit.
What to expect
RODAR® II is a deterrent, not a magic wall.
It helps make the target area less comfortable for pests. The outcome depends on how the space is set up, how much pest pressure exists, and whether the conditions that attracted pests are also being addressed.
Some situations improve quickly. Others need more time and better conditions.
Keep RODAR® II running while food, water, shelter, and entry points are reduced. If pests still have easy access to food or a protected nest, any repelling method has to work harder.
Room layout
Open areas are easier to cover. Walls, closed doors, furniture, cabinets, and packed storage can reduce the sound path.
Pest pressure
A light prevention problem is different from a heavy infestation with nesting, repeated entry, or several food sources.
Attractants
Crumbs, pet food, bird seed, garbage, water, warmth, and clutter give pests reasons to stay even when the room is less comfortable.
Run time
Continuous operation helps maintain the repelling environment. Do not unplug the unit after the first quiet night.
Better results checklist
Make the space harder to enter, harder to live in, and harder to ignore.
RODAR® II works best as part of a practical pest-prevention plan. Remove what attracts pests, block easy access, and keep ultrasonic coverage aimed where pests are active.
Clean away food sources.
Crumbs, open trash, pet food, bird seed, and pantry spills can keep pests interested in the room.
Reduce water and shelter.
Fix leaks, remove standing water, and reduce clutter that gives pests hidden travel and nesting areas.
Seal likely entry points.
Look around pipes, vents, doors, foundations, utility gaps, and exterior openings after pests have a safe way out.
Keep the sound path open.
Face the unit toward open air. Move boxes, curtains, furniture, and appliances away from the front of the unit.
Use more than one when needed.
Separate rooms, closed doors, and multiple pest-prone areas may require more than a single unit.
Leave it working.
RODAR® II is designed for continuous indoor operation with low electricity use.
Where to use it
Built for enclosed spaces where pests try to settle.
Use RODAR® II where ultrasonic coverage can face the problem area directly.
Kitchens & pantries
Aim across food-adjacent areas while cleaning crumbs, sealing pantry goods, and removing pet-food access.
Attics & eaves
Face open rafters, roosting areas, travel paths, or suspected entry zones. For bats, follow local wildlife guidance before sealing routes.
Garages & basements
Point into open storage, corners, utility areas, or wall-adjacent paths where rodents and crawling pests may travel.
Cabins & campers
Use before and during inactive seasons, paired with food removal, sealed containers, and regular inspections.
Storage rooms & workshops
Keep the unit clear of boxes and shelving so sound can cover the open area, not the back of a storage stack.
Businesses & work areas
Use in enclosed offices, break rooms, restaurants, farm buildings, and similar areas as part of good housekeeping and maintenance.
The Micron difference
Pest control electronics should be built like electronics.
Micron has manufactured RODAR® systems since 1992 and has been involved in the product's design, manufacturing, marketing, fulfillment, and support since the beginning. That history matters for a device expected to run quietly and continuously in real homes, storage spaces, and work areas.
One room, two separate jobs. RODAR® II focuses on pest deterrence. EnergAire® focuses on the air people breathe and experience in the room.
Two devices. Two jobs. One more comfortable space.
RODAR® II and EnergAire® are designed to do different things. RODAR® II uses high-frequency ultrasonic sound to help make pest-prone areas less inviting. EnergAire® uses quiet, filter-free ionization to help reduce airborne dust, pollen, smoke, and other fine particles.
Used in the same enclosed room, they provide a practical way to address pest pressure and everyday air comfort without confusing one product with the other.
Give ultrasonic sound a clear path toward pest travel routes, nesting areas, or likely entry points.
Place it where room air can circulate around the unit instead of hiding it behind boxes or furniture.
Run the devices consistently while sealing openings, cleaning, controlling moisture, and removing food sources.
Pets and people
Designed for people spaces. Use care around pet rodents.
RODAR® II is listed as safe for non-rodent pets. Because the product is designed to repel rodents, it should not be used directly around pet rats, mice, hamsters, gerbils, guinea pigs, or similar small rodent pets.
For homes with cats and dogs
Use RODAR® II in the target room according to the setup guidance. Keep it dry, uncovered, and aimed away from obstructions.
For small rodent pets
Do not place RODAR® II near pet rodents or small rodent enclosures. Move the unit to a different area or contact support for placement help.
Ready for the next step?
Put ultrasonic coverage where pests are trying to stay.
Order RODAR® II for kitchens, attics, basements, garages, cabins, campers, storage rooms, offices, and other enclosed pest-prone spaces.
Questions before ordering
Helpful answers about how RODAR® II works.
A few practical details can make setup easier and expectations clearer.
How does RODAR® II repel pests?
RODAR® II emits high-frequency ultrasonic sound designed to make the protected area less comfortable for many pests, encouraging them to move away from the sound source.
Can people hear RODAR® II?
The ultrasonic frequency range is above normal human hearing. The device is designed to work quietly in the background while it is plugged in.
Does ultrasound go through walls?
No. Ultrasonic sound works through open air and can reflect off hard surfaces, but walls, closed doors, heavy furniture, boxes, and cabinets can block or reduce coverage.
How many units are needed?
One unit can cover up to 3,000 square feet under favorable conditions. Divided spaces, blocked sound paths, multiple rooms, or separate pest zones may need additional units.
How soon should results be expected?
Some activity may change quickly, while other situations take longer. Results depend on pest type, infestation pressure, room layout, nesting, food sources, and placement.
Does RODAR® II use poison or traps?
No. RODAR® II is an electronic repelling device. It does not use bait, poison, chemical sprays, or traps.
Is RODAR® II safe for pets?
RODAR® II is listed as safe for non-rodent pets. Because it is designed to repel rodents, avoid using it near pet rats, mice, hamsters, gerbils, guinea pigs, or similar small rodent pets.
Can RODAR® II be used outdoors?
RODAR® II is intended for enclosed indoor spaces such as homes, kitchens, basements, attics, garages, cabins, campers, offices, storage areas, farms, and restaurants.
Make the problem area less comfortable for pests.
Plug in RODAR® II, aim it where pests are active, and support the unit with the prevention steps that make any space harder for pests to use.