You’re probably tired of spotting mouse droppings and hearing scurrying at night, and you want a hassle‑free solution that protects every corner of your home. The 12 best mouse repellent plug‑ins for 2026 promise whole‑home coverage, low power draw, and safe operation around kids and pets. Each device uses multi‑frequency ultrasonic waves to deter rodents, and most cover 800–1,600 sq ft per unit. If you’re curious about which models actually deliver on those claims and how to position them for maximum effect, the details ahead will show you exactly what to look for.
| 2026 Ultrasonic Pest Repeller – 6 Pack Indoor Mouse Control | ![]() | Best Overall | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): 800–1200 m² (≈8,600–12,900 ft²) | Pest Types Targeted: Mice, rats, rodents, fleas, cockroaches, flies, mosquitoes | CHECK ON AMAZON | Read Our Analysis |
| Ultrasonic Pest Repeller Plug-in 4-Pack Indoor Insect Deterrent | ![]() | Budget-Friendly | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): 800–1200 ft² | Pest Types Targeted: Roaches, rodents, mice, bugs, mosquitoes, spiders, ants | CHECK ON AMAZON | Read Our Analysis |
| 2026 Ultrasonic Pest Repeller 6-Pack Black | ![]() | High Coverage | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): 1600 ft² | Pest Types Targeted: Mice, fleas, cockroaches, insects, mosquitoes, ants, spiders, bed bugs, rodents, bugs | CHECK ON AMAZON | Read Our Analysis |
| OWLTRA Ultrasonic Rodent Repellers 4 Pack – Silent Safe | ![]() | Silent Guard | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): Medium‑room (≈200–300 ft²) | Pest Types Targeted: Rodents (mice, rats) | CHECK ON AMAZON | Read Our Analysis |
| 2026 Ultrasonic Indoor Pest Repeller 6 Pack | ![]() | Energy Saver | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): Up to 1200 ft² | Pest Types Targeted: Mice, fleas, cockroaches, ants, spiders, mosquitoes, bed bugs, roaches | CHECK ON AMAZON | Read Our Analysis |
| Ultrasonic Pest Repeller (2-Pack) Indoor Insect Control | ![]() | Compact Pack | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): Whole‑house (unspecified) | Pest Types Targeted: Fleas, rats, roaches, mosquitoes, cockroaches, rodents, spiders, scorpions, fruit flies | CHECK ON AMAZON | Read Our Analysis |
| Bell+Howell 2026 Ultrasonic Pest Repeller Kit | ![]() | Versatile Choice | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): One room per unit (≈200–300 ft²) | Pest Types Targeted: Roaches, mice, rats, spiders, ants | CHECK ON AMAZON | Read Our Analysis |
| Mighty Mint Mouse Repellent Pouches – 12 Count | ![]() | Natural Aroma | Power Source: Not applicable (pouch) – N/A | Coverage Area (per unit): Not applicable – N/A | Pest Types Targeted: Mice (rodents) | CHECK ON AMAZON | Read Our Analysis |
| Ultrasonic Mouse Repellent Plug – 360° LED Rodent Deterrent | ![]() | Dual-Action | Power Source: USB‑C powered plug‑in | Coverage Area (per unit): 2400 ft² | Pest Types Targeted: Mice, rats, squirrels (rodents) | CHECK ON AMAZON | Read Our Analysis |
| Ultrasonic Insect Repeller – 3 Modes 6‑Pack | ![]() | Triple-Mode | Power Source: Plug‑in (wall outlet) | Coverage Area (per unit): 20 kHz–60 kHz coverage (≈200–300 ft²) | Pest Types Targeted: Roach, rodents, mice, bugs, mosquitoes, spiders, ants | CHECK ON AMAZON | Read Our Analysis |
| Victor M805 Natural Rodent Repeller – 5 Peppermint Sachets | ![]() | Peppermint Power | Power Source: Sachet (no power) – N/A | Coverage Area (per unit): Not applicable – N/A | Pest Types Targeted: Mice, rats (rodents) | CHECK ON AMAZON | Read Our Analysis |
| Tomcat Peppermint Mouse & Rat Repellent (1 Gallon) | ![]() | Spray Solution | Power Source: Spray bottle (no power) – N/A | Coverage Area (per unit): ≈2550 ft² (spray) | Pest Types Targeted: Mice, rats (rodents) | CHECK ON AMAZON | Read Our Analysis |
More Details on Our Top Picks
2026 Ultrasonic Pest Repeller – 6 Pack Indoor Mouse Control
If you’re looking for a low‑maintenance, pet‑safe way to deter mice throughout your home, the 6‑pack Ultrasonic Pest Repeller is a solid pick. Its ultrasonic chip emits sonic waves that disturb rodents’ auditory and nervous systems, driving them away without killing. The units are odorless, noiseless, and safe for dogs and cats, using sound instead of chemicals, so they’re energy‑efficient. Each device covers roughly 800–1200 sq m; place one per average‑sized room, adding more for larger spaces. Plug them into wall sockets at 10–47 inches height and let the continuous protection work for three to four weeks before you notice a reduction.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):800–1200 m² (≈8,600–12,900 ft²)
- Pest Types Targeted:Mice, rats, rodents, fleas, cockroaches, flies, mosquitoes
- Safety for Humans & Pets:Safe (odorless, no radiation, silent)
- Energy Consumption:Low (ultrasonic, no chemicals)
- Installation / Placement Guidance:Plug in, 10–47 inches from floor, one per room
- Additional Feature:Multi‑frequency conversion system
- Additional Feature:3‑4 week effect timeline
- Additional Feature:10–47 inches height range
Ultrasonic Pest Repeller Plug-in 4-Pack Indoor Insect Deterrent
Looking for a hassle‑free, chemical‑free way to keep mice and other indoor pests at bay? This 2026 upgraded ultrasonic repeller plug‑in comes in a four‑pack, each unit plugging into a standard outlet and flashing a soothing blue light while emitting a high‑frequency beep that unsettles roaches, rodents, spiders, ants, and mosquitoes. You’ll notice activity shifting within two to four weeks, though a brief surge may occur as pests evacuate hiding spots. Each device covers roughly 800‑1200 sq ft, so place one per open room for best results. It draws only 3‑5 W, uses no batteries, and leaves no chemicals or dead insects behind.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):800–1200 ft²
- Pest Types Targeted:Roaches, rodents, mice, bugs, mosquitoes, spiders, ants
- Safety for Humans & Pets:Safe (chemical‑free, odorless)
- Energy Consumption:3–5 W
- Installation / Placement Guidance:Plug in, one per room, open space preferred
- Additional Feature:Soothing blue breathing light
- Additional Feature:Temporary activity surge early
- Additional Feature:3‑5 W power draw
2026 Ultrasonic Pest Repeller 6-Pack Black
Who needs a hassle‑free, whole‑home mouse deterrent? The 2026 Ultrasonic Pest Repeller 6‑Pack in black gives you exactly that. Plug each unit into a wall outlet, and a subtle light signals the 10 kHz–65 kHz ultrasonic waves that scramble pests’ brain and auditory nerves. One device covers up to 1,600 sq ft, so you’ll place them vertically in bedrooms, kitchens, garages, or offices, 10–50 inches from the floor. They’re safe for children, pregnant women, and pets, emit no odor, and run silently at night. Expect noticeable reduction in three to four weeks, with pests gone in five to seven weeks, all without maintenance or extra batteries.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):1600 ft²
- Pest Types Targeted:Mice, fleas, cockroaches, insects, mosquitoes, ants, spiders, bed bugs, rodents, bugs
- Safety for Humans & Pets:Safe for children, pregnant women, pets
- Energy Consumption:3–5 W
- Installation / Placement Guidance:Plug in, vertical, 10–50 inches from floor, one per room
- Additional Feature:10 kHz–65 kHz frequency range
- Additional Feature:Night‑time silent mode
- Additional Feature:1600 sq ft coverage per unit
OWLTRA Ultrasonic Rodent Repellers 4 Pack – Silent Safe
Families with small children or non‑rodent pets will appreciate the OWLTRA OW‑5 ultrasonic repeller’s completely silent operation, because it emits high‑frequency sound that’s inaudible to humans while driving mice and rats away. The white, plug‑in units work by targeting rodents’ nervous systems, causing them to flee without chemicals. Each of the four devices covers a medium‑sized room, and the built‑in night light shows it’s on. Install them away from walls or furniture that could block the sound, and avoid solid obstacles. For larger infestations, combine them with traps or baits. You’ll see results in about two weeks, and the solution remains poison‑free and safe.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):Medium‑room (≈200–300 ft²)
- Pest Types Targeted:Rodents (mice, rats)
- Safety for Humans & Pets:for children & non‑rodent pets (silent)
- Energy Consumption:Low (plug‑in, silent)
- Installation / Placement Guidance:Plug in, avoid solid objects, one per medium room
- Additional Feature:Built‑in night light
- Additional Feature:Poison‑free design
- Additional Feature:Effective within two weeks
2026 Ultrasonic Indoor Pest Repeller 6 Pack
If you need a hassle‑free, chemical‑free way to keep mice and other pests out of every room, the 2026 Ultrasonic Indoor Pest Repeller 6‑Pack is the smart choice. Each plug‑in emits intelligent ultrasonic frequencies that rotate 24/7, irritating pest nervous systems without affecting electronics. You’ll place one unit per area, 10‑47 inches off the floor, and keep the space around it clear of curtains or solid blocks. One device covers up to 1,200 sq ft, draws only 3‑5 W, and works silently. Expect noticeable reduction in mice, fleas, roaches, ants, spiders, mosquitoes, and bed bugs within three to four weeks—safe for kids, pets, and seniors.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):Up to 1200 ft²
- Pest Types Targeted:Mice, fleas, cockroaches, ants, spiders, mosquitoes, bed bugs, roaches
- Safety for Humans & Pets:Safe for family & pets (chemical‑free, silent)
- Energy Consumption:3–5 W
- Installation / Placement Guidance:Plug in, 10–47 inches off floor, one per room, clear area
- Additional Feature:Intelligent alternating frequency
- Additional Feature:1200 sq ft coverage per unit
- Additional Feature:Energy‑smart 3–5 W consumption
Ultrasonic Pest Repeller (2-Pack) Indoor Insect Control
Looking for a hassle‑free, pet‑safe way to keep mice, roaches, and other indoor pests at bay? The Ever Pest Ultrasonic Pest Repeller (2‑Pack) plugs directly into any outlet and emits high‑frequency sound that’s inaudible to humans and pets but deters fleas, rodents, cockroaches, spiders, fruit flies, and more. You’ll start noticing fewer critters after about a week, with full effect by four weeks. It ranks #17 in indoor ultrasonic repellers and holds a perfect 5‑star rating from 346 reviewers. Amazon offers a 30‑day return and the device comes with a standard warranty, making it a low‑risk, whole‑home solution.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):Whole‑house (unspecified)
- Pest Types Targeted:Fleas, rats, roaches, mosquitoes, cockroaches, rodents, spiders, scorpions, fruit flies
- Safety for Humans & Pets:Pet‑friendly (humane)
- Energy Consumption:Low (plug‑in)
- Installation / Placement Guidance:Plug in, whole‑house coverage, keep area clear
- Additional Feature:7–28 day result window
- Additional Feature:5‑star Amazon rating
- Additional Feature:30‑day return guarantee
Bell+Howell 2026 Ultrasonic Pest Repeller Kit
The Bell+Howell 2026 Ultrasonic Pest Repeller Kit is the top pick for anyone who wants a chemical‑free, pet‑safe solution that protects each room individually without any hassle. You’ll plug each of the four units into a standard two‑prong outlet, and the intelligent variable technology will emit continuously shifting ultrasonic waves that pests can’t tolerate but humans can’t hear. The kit covers roaches, mice, rats, spiders, and ants, with each device confined to a single room to avoid cross‑talk. It’s odorless, silent, and requires no maintenance—just set the LED indicator and forget it, while keeping your family, pets, and the environment safe.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):One room per unit (≈200–300 ft²)
- Pest Types Targeted:Roaches, mice, rats, spiders, ants
- Safety for Humans & Pets:100 % safe for humans & pets (odor‑free)
- Energy Consumption:Low (plug‑in)
- Installation / Placement Guidance:Plug in, one per room, avoid obstacles
- Additional Feature:Variable wavelength technology
- Additional Feature:LED status indicator
- Additional Feature:Plug‑and‑forget simplicity
Mighty Mint Mouse Repellent Pouches – 12 Count
Home seeking a hassle‑free, chemical‑free way to keep mice out of kitchens, basements, and garages, the Mighty Mint Mouse Repellent Pouches—12 count—deliver long‑lasting protection with a plant‑based formula of peppermint, cinnamon, and castor oils. You’ll place each pouch where rodents travel, and the concentrated essential oils work for weeks, driving mice away without traps or poisons. The fresh, pleasant scent freshens the air while deterring pests, so you won’t notice a harsh chemical odor. Made in the USA with premium, farm‑grown oils, these humane pouches offer reliable, natural rodent control throughout your home.
- Power Source:Not applicable (pouch) – N/A
- Coverage Area (per unit):Not applicable – N/A
- Pest Types Targeted:Mice (rodents)
- Safety for Humans & Pets:Safe (natural, plant‑based)
- Energy Consumption:Not applicable – N/A
- Installation / Placement Guidance:Hang sachets in enclosed spaces (closets, attics)
- Additional Feature:Plant‑based peppermint formula
- Additional Feature:Long‑lasting weeks protection
- Additional Feature:Pleasant fresh scent
Ultrasonic Mouse Repellent Plug – 360° LED Rodent Deterrent
Need you need a plug‑in that protects every corner of your house while staying invisible to pets and kids, the 360° LED ultrasonic mouse repellent is the clear winner. Its Triple Wave Defense delivers pressure, ultrasonic, and electromagnetic modes, covering up to 2,400 sq ft of kitchen, attic, garage, or RV space. You’ll hear 90 dB bursts and see a 360° LED strobe that cuts pest activity within two to four weeks. The device runs silently above 25 kHz, safe for humans and pets, and sips just 2.5 W—75 % less power than typical units. Plug it into any USB‑C outlet, and you’ll see instant visual confirmation, with full coverage established in seconds.
- Power Source:USB‑C powered plug‑in
- Coverage Area (per unit):2400 ft²
- Pest Types Targeted:Mice, rats, squirrels (rodents)
- Safety for Humans & Pets:Safe (frequencies >25 kHz)
- Energy Consumption:2.5 W
- Installation / Placement Guidance:USB‑C plug, corner placement, clear of obstructions
- Additional Feature:Triple wave defense modes
- Additional Feature:360° LED strobe
- Additional Feature:USB‑C power option
Ultrasonic Insect Repeller – 3 Modes 6‑Pack
Looking for a hassle‑free way to keep roaches, mice, and other bugs out of every room? This ultrasonic insect repeller set gives you three adaptive modes and six plug‑in units, covering the whole house. It emits 20‑60 kHz sound waves that irritate pest brain neurons, eventually driving them away without chemicals or traps. The frequencies rotate intelligently, targeting roaches, ants, spiders, mosquitoes, and rodents. Each unit draws only 3–5 W, like a tiny desk lamp, and stays silent to humans and pets. Expect noticeable reduction within one to two weeks, and keep them plugged in to prevent recurrence.
- Power Source:Plug‑in (wall outlet)
- Coverage Area (per unit):20 kHz–60 kHz coverage (≈200–300 ft²)
- Pest Types Targeted:Roach, rodents, mice, bugs, mosquitoes, spiders, ants
- Safety for Humans & Pets:Safe (inaudible, eco‑friendly)
- Energy Consumption:3–5 W
- Installation / Placement Guidance:Plug in, one per room, keep area clear of curtains/furniture
- Additional Feature:Three adjustable modes
- Additional Feature:20 kHz–60 kHz range
- Additional Feature:No odor, chemical‑free
Victor M805 Natural Rodent Repeller – 5 Peppermint Sachets
If you want a natural, mess‑free way to keep rodents at bay, the Victor M805 Natural Rodent Repeller’s five peppermint‑oil sachets are a solid pick. The breathable mesh bags hold granules that release a minty scent, subtly discouraging mice and rats without chemicals. Hang or place them in closets, cupboards, attics, sheds, or even vehicles for discreet protection. Each sachet lasts up to 30 days, so you’ll replace them monthly or when the aroma fades. The formula is safe for children and pets, offering a humane alternative to traps or sprays while covering multiple indoor spots.
- Power Source:Sachet (no power) – N/A
- Coverage Area (per unit):Not applicable – N/A
- Pest Types Targeted:Mice, rats (rodents)
- Safety for Humans & Pets:Safe (natural peppermint, pet‑friendly)
- Energy Consumption:Not applicable – N/A
- Installation / Placement Guidance:Hang mesh sachets in enclosed areas (closets, cupboards)
- Additional Feature:Mesh breathable sachets
- Additional Feature:30‑day scent duration
- Additional Feature:Hang‑or‑place flexibility
Tomcat Peppermint Mouse & Rat Repellent (1 Gallon)
Homeowners who want a hassle‑free, long‑lasting solution for both indoor and outdoor rodent control will find Tomcat Peppermint Mouse & Rat Repellent (1 gal) a top pick. The ready‑to‑use spray covers roughly 2,550 sq ft., so you can treat doors, windows, cracks, pipes and vents with a single bottle. Its essential‑oil blend—garlic, peppermint, cinnamon—creates a scent and taste rodents avoid, yet the no‑stink formula stays safe for kids and pets when used as directed. The battery‑operated Comfort Wand makes application quick, and the rain‑resistant, long‑lasting coating means you only need to re‑spray every 30 days for continuous protection.
- Power Source:Spray bottle (no power) – N/A
- Coverage Area (per unit):≈2550 ft² (spray)
- Pest Types Targeted:Mice, rats (rodents)
- Safety for Humans & Pets:Safe (essential‑oil blend, pet‑friendly)
- Energy Consumption:Not applicable – N/A
- Installation / Placement Guidance:Spray entry points, repeat every 30 days, indoor & outdoor use
- Additional Feature:Garlic‑peppermint‑cinnamon blend
- Additional Feature:Rain‑resistant formula
- Additional Feature:Comfort Wand applicator
Factors to Consider When Choosing Mouse Repellent Plug-Ins for Whole-Home Protection
You’ll want to check the coverage range to make sure the device protects every room you need. Look at the frequency type and safety ratings, since some ultrasonic sounds can bother pets or humans. Finally, consider energy use, cost, and how easy the plug‑in is to install in your preferred spots.
Coverage Range and Coverage
Wondering how far a single ultrasonic repeller can actually protect? Most plug‑ins claim 800–1200 sq ft per unit, but walls and furniture eat away at that range. To cover a whole home, you’ll usually need one device per room, keeping the ultrasonic field open and avoiding signal interference. Open‑plan layouts benefit from evenly spaced units so waves can travel unblocked; cramped spaces may need extra devices to fill gaps. Some models tout 1600–2400 sq ft total coverage, yet the real limiter is each room’s effective radius. If you have a large floor plan or a severe mouse problem, add units beyond the basic per‑room rule to ensure consistent exposure and noticeable results.
Frequency Range and Types
What frequency should you look for in a mouse‑repellent plug‑in? Aim for devices that emit ultrasonic tones between 10 kHz and 65 kHz, because that range stays inaudible to people while irritating rodents. Look for models that cycle through multiple frequencies or use intelligent frequency‑switching; this prevents mice from getting used to a single tone and keeps the deterrent effective longer. A single‑tone unit may work initially but can lose potency as pests adapt. If your home has many walls or furniture, a multi‑frequency system helps the sound penetrate obstacles more reliably. Remember, these devices draw only 2.5–5 watts, so you get continuous protection without a hefty electricity bill.
Safety for Humans and Pets
After selecting a multi‑frequency unit, verify that its ultrasonic output is truly harmless to people and pets. Look for manufacturers that label the device “safe for children and pets” and confirm it emits no odors, toxins, or radiation. Ensure the unit operates at inaudible levels for humans, and check that it advises against direct exposure to high‑intensity waves. Place the plug‑in in an open area with a clear line of sight, because the sound won’t pass through walls or solid furniture. Keep it at the recommended height—typically 10–50 inches off the floor—to avoid interference with delicate electronics or other household items. Remember, effectiveness may take weeks, but safety should be immediate.
Energy Consumption and Cost
How much will a mouse‑repellent plug‑in really cost you in electricity? You’ll typically see a draw of 2.5‑5 watts per unit, so a single device adds only a few cents to your monthly bill. If you place one in each room—say six to eight units—the total power use scales linearly, still staying under a few watts per hour. For a 3‑watt model running 24 hours a day, the annual energy consumption is roughly 26 kWh, which translates to about $3‑$5 depending on your utility rate. Energy‑efficient designs avoid batteries and operate silently off wall power, keeping costs low while delivering constant deterrence. Choosing lower‑watt models lets you protect a whole home without noticeably raising your electricity expenses.
Placement and Installation Tips
Where should you position each plug‑in for maximum impact? You’ll want one unit per average‑sized room because ultrasonic waves won’t cross walls. Mount each device 10–50 inches above the floor, where mice travel, and keep the surrounding area free of curtains, furniture, or solid objects that could block the sound. In larger homes or open floor plans, spread units through interconnected spaces to create overlapping coverage. Avoid placing plugs near metal appliances or dense shelving, as these can reflect or absorb the waves. Use a simple power strip to keep cords tidy and ensure each outlet is easily reachable for occasional battery checks. By following these steps, you’ll maximize the repellent’s reach and maintain consistent whole‑home protection.
Effectiveness Timeline and Expectation
Wondering how quickly you’ll see results? You’ll typically notice a drop in mouse activity within three to four weeks, though some units report early changes as soon as two weeks, depending on infestation severity. Expect a brief surge in movement during the first one to two weeks as pests relocate before the overall decline sets in. Each plug‑in covers roughly 800–1,200 sq ft, but walls can dampen the ultrasonic waves, so you may need multiple devices for full‑home protection. The devices deter rather than kill, affecting mice, rats, roaches, spiders, ants, and even mosquitoes. They draw just 3–5 W, run continuously, and are safe for humans and pets, delivering ongoing protection once the initial adjustment period passes.
Compatibility With Home Layout
After you see the initial drop in activity, the next step is matching the devices to your home’s layout. One plug‑in per room works best because ultrasonic waves don’t reliably cross walls, so you’ll need a unit in each major space—living area, kitchen, bedroom, garage. Map your home’s typical pest zones and place a repeller in each, avoiding clusters that leave gaps. Open‑plan rooms and bulky furniture can block waves, so position units where they have a clear line of sight to the corners. High ceilings or thick drywall dampen signals; consider adding extra units in those areas to keep coverage uniform. Follow each model’s 800–1200 sq ft rating, spacing devices systematically to eliminate dead spots and ensure whole‑home protection.
Frequently Asked Questions
Do Ultrasonic Repellers Work on Outdoor Mouse Infestations?
You’ll find ultrasonic repellers rarely work outdoors because weather dampens the waves and walls block them; mice can hear them in a house, but open spaces let the sound dissipate quickly.
Can I Use Multiple Plug‑Ins in the Same Room Without Interference?
Yes, you can stack several plug‑ins together; just keep them at least a foot apart, avoid overlapping frequencies, and make sure your outlet circuit can handle the combined wattage without tripping.
What Is the Average Lifespan of the Device’s Battery or Power Source?
You’ll get roughly two to three years of battery life, depending on usage and model, because most units run on rechargeable lithium‑ion packs that hold charge for about 1,000‑1,500 cycles.
Do These Devices Affect Pets or Other Household Electronics?
You’ll find most plug‑ins safe for pets and electronics; they emit ultrasonic waves that rodents hear, but cats, dogs, and appliances generally ignore them, though you should monitor any unusual animal reactions.
How Do I Know if a Repeller Is Actually Deterring Mice in My Home?
You’ll notice fewer droppings, fewer gnaw marks, and fewer sightings; set up motion‑sensor cameras or tracking pads near entry points, and compare activity before and after the repeller’s installation.
















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