Cat Repellent Outdoor 2 Pack, Solar Ultrasonic with PIR Motion Sensor

Description

If wandering cats keep treating your beds like a litter box, this Cat Repellent Outdoor, 2 Pack Solar Animal Repeller Ultrasonic Cat Deterrent with PIR Motion Sensor, Waterproof Pest Repeller for Garden and Yard offers a humane, hands-off way to reclaim your space. It uses motion-triggered ultrasonic sound that targets a cat’s sensitive hearing while staying quiet to most people, and it runs on sunlight so you can set it and forget it. That makes it a kinder choice for deterring cats and other small intruders without chemicals or traps, aligning with animal-welfare guidance to use non-harmful methods.

Key Customer Benefits

• Humane, pet-safe deterrence you can feel good about: Ultrasonic devices and motion-activated deterrents are recommended by respected welfare groups as a non-harmful way to move cats along. The Royal Horticultural Society notes that electronic scarers and water-release devices are designed to discourage visits without hurting animals, and Alley Cat Allies lists ultrasonic repellents among humane options for protecting gardens and yards.
• Proven to cut unwanted visits, so your beds can recover: Independent field research has measured meaningful reductions when ultrasonic deterrents are used correctly. In a controlled trial, gardens saw a 46 percent drop in cat incursions and a 78 percent reduction in how long cats stayed. Another study found a moderate, real-world deterrent effect, which aligns with what many homeowners report when units are positioned and maintained well.
• Targets a cat’s sensitive hearing while staying quiet to most people: Cats hear far higher frequencies than humans, with an upper limit reported around eighty-five kilohertz. Ultrasonic cat scarers operate in a range that cats notice and people typically do not, which makes them a neighbor-friendly choice for patios, flower beds, and front walks.
• Motion-activated precision that works only when it needs to: The built-in PIR motion sensor focuses deterrence on real movement, which helps reduce habituation and saves power. Many comparable solar animal repellers specify a detection arc around one hundred ten degrees and a trigger distance in the mid-twenties to thirty feet, giving you focused coverage along fence lines, raised beds, bird feeders, and entry paths.
• Solar powered convenience, lower running costs, and fewer throwaway batteries: Because the unit charges from sunlight and stores energy for night use, there are no extension cords to hide and no disposable cells to keep buying. Solar systems produce no air pollution during operation and cut reliance on grid electricity, while reducing the number of batteries you consume and eventually need to recycle. The U.S. Energy Information Administration and Department of Energy explain these benefits, and the EPA details why reducing improper battery disposal matters for safety and the environment.
• Built for outdoor life, from rainy seasons to sprinkler overspray: Garden-grade units are typically waterproof and weather resistant, so they can sit near beds, lawns, or pathways through sun and showers. Listings for comparable solar ultrasonic repellers specify waterproof housings for year-round use, which is ideal when you want a set-and-forget solution that still protects your space from cats, raccoons, skunks, squirrels, and more.

Product Description

What this device is:

This cat repellent outdoor kit is a two-pack of solar ultrasonic animal deterrents designed for gardens, beds, and entry paths. Each unit sits on a stake or mounts to a fence, then listens for movement with a PIR motion sensor and emits a high-frequency burst that cats find uncomfortable. The design is deliberately humane and hands-off, which lines up with Royal Horticultural Society guidance to use non-harmful deterrents like electronic scarers or motion-triggered devices to encourage visiting cats to move along.

In typical models within this category you will see a detection arc around one hundred ten degrees and a trigger distance in the mid-twenties to about thirty feet, which is a useful footprint for flower borders and bird feeder zones. Many consumer units also advertise weather resistance and waterproof housings for year-round use.

How it works, and why cats notice it

When the PIR sensor detects body heat in motion, the device fires a short burst of sound at ultrasonic frequencies that sit above normal human hearing but within a cat’s extended high-frequency range. The PIR is passive, which means it does not shine or scan, it simply watches for changes in infrared energy, and the most common garden PIR packages cover about ten meters with a wide field of view. Cats are unusually sensitive to high frequencies, with classic audiogram research showing an upper limit near eighty-five kilohertz at test levels, so a tone that flies past us can still be very noticeable to them. That is the core of the deterrent method.

What makes it effective and different in real gardens

Independent testing has found ultrasonic cat scarers can reduce visits when positioned and maintained well. Peer-reviewed work reported a moderate but meaningful effect, including reductions in the probability of a garden intrusion and shorter stay times once a cat was detected. Those results mirror what the RHS notes from field experience, namely that some cats leave promptly while more dominant or habituated cats may ignore the signal, and that best results come when sound can project without being blocked by walls, dense shrubs, or fencing.

In practice, this is why two units, aimed to cover the cat’s typical approach, outperform a single head-on device. If you are comparing models, look for clear specs such as one hundred ten degree detection, an effective trigger distance around twenty-six feet, and an outdoor rating like IP44, which are common benchmarks in this category.

Product Specifications

Category	What to expect on a quality 2-pack solar ultrasonic repeller
Power	Built-in solar panel for daily charging, plus backup USB charging when sunlight is limited. Many units also ship with rechargeable AA NiMH cells.
Battery type and capacity	Common configurations include 3 to 4 AA NiMH rechargeable batteries per unit. Some packages include 3 x AA NiMH preinstalled, others require you to supply them. Use NiMH rechargeables as specified by manuals.
PIR motion sensor	Passive Infrared sensor with a wide viewing angle, typically about 110 degrees.
Detection distance	Realistic trigger distance sits around 20 to 30 feet depending on animal size and placement, with some models specifying 6 to 10 meters. Plan coverage conservatively at the lower end.
Ultrasonic frequency	Adjustable ultrasonic output across roughly 13.5 kilohertz to the mid-40s kilohertz on multi-mode units. Other branded cat specific devices publish bands from 17 to 27 kilohertz or sweeping 10 to 50 kilohertz.
Coverage footprint	Typical manufacturer claims are a 110 degree arc with an effective area of roughly 150 square meters at up to 12 meters for premium EU models, or about 369 square feet at 10 meters for UK cat specific units. Treat these as best case, unobstructed lines of sight.
Housing and materials	Outdoor ABS plastic housing, designed for weather exposure.
Weather rating	Look for a stated rating. You will commonly see IP44 weather resistance on value devices, IP54 rain resistant on mid-range, and IPX6 on higher end garden units. Do not submerge.
LED deterrent options	Some units add flashing LEDs or a visible strobe as a secondary cue, which you can disable if you only want ultrasound.
Typical dimensions and weight	One well documented solar unit lists approximately 4.3 by 2.1 by 14 inches with stake, about 7 ounces. Smart UK models list around 34.5 cm tall by 10 cm wide by 5.5 cm deep. Your packaging may vary slightly.
Operating temperature	Common guidance for European models is roughly minus 10 degrees Celsius to plus 40 degrees Celsius.
What is in the box	Repeller head with integrated solar panel, ground stake and tubes, USB cable for charging on cloudy weeks, user manual. Wall mounting via keyholes is often supported.
Animals typically targeted	Cats, dogs, raccoons, skunks, squirrels and larger birds on higher modes. Frequency charts in several manuals map modes to target animals.
Safety notes	Follow battery guidance in the manual and keep out of reach of small children. One UK manual cautions that powerful ultrasonic output may affect very young children, so turn the unit off when infants are present in the garden. Ultrasound does not penetrate walls or fences, so aim for clear line of sight.
Compliance and certifications	Look for documentation such as EU Declarations of Conformity. A leading EU brand publishes compliance with EMC and RoHS, and lists IP54 protection. Retail listings for other devices often note CE and RoHS marks.

 

How to Use and Install Your Cat Repellent Outdoor

1) Walk the space and choose smart locations

Start by watching where the cats actually travel. Typical routes are along fence lines, narrow borders, and between parked cars and hedges. Ultrasonic sound works in straight lines and does not pass through solid objects, so plan for clear sight lines toward those approach paths rather than pointing into thick shrubs or walls. The Royal Horticultural Society includes electronic scarers in its list of humane cat deterrents, and the practical key is placement where visits occur. Keep the head aimed across the approach, not straight at a wall or dense plants.

2) Set the right height and angle

Stake each unit so that the sensor window sits roughly shin height to a cat. A published UK cat-repeller manual specifies an ideal height between about 13 and 35 centimeters, with a typical detection footprint of about 8 meters and a 110 degree arc when sited correctly. Angle the face level or slightly downward so the beam sweeps the route cats use, and keep the lens clear of overhanging foliage that could sway in wind.

3) Give the batteries a proper first charge

These solar ultrasonic repellents work on rechargeable cells that the panel tops up daily. Before first use, fully charge by USB as the manuals advise, especially if you are installing in shade or mid-winter. Several manufacturer guides recommend a first charge on USB for about six hours, sometimes in repeated cycles, then normal solar maintenance charging. Position each head where it gets good daylight.

4) Install the first unit, then overlap with the second

Start with the device that guards the most common entry. Push the stake in by hand, never by pressing on the solar panel. Once the first zone is covered, add the second unit to catch the cat’s exit route or to remove a blind spot. Security sensor manuals recommend orienting motion sensors so targets move across the field rather than straight at it, which reduces misses and shortens the reaction time. Overlapping arcs also help prevent quick dashes through a single beam. Avoid pointing at public footpaths or busy sidewalks to limit nuisance triggers.

5) Dial in the knobs: sensitivity and frequency

Most two-knob garden units give you a left knob for sensitivity and a right knob for frequency. Raise sensitivity until you reliably catch cat-sized movement, then back off if wind-moved plants cause false triggers. Use frequency settings tuned for cats if your manual lists animal-specific bands, then experiment if a local cat ignores the tone. Manufacturer literature explains that individual hearing varies, so small frequency changes can make a previously indifferent cat move on.

6) Confirm detection and be patient as habits change

Use the device’s test cues, such as the PIR LED, to confirm that movement in the target path triggers the unit. Field trials found ultrasonic deterrents cut resident cat incursions and time on site when the devices were correctly sited. Realistic results often build over days, not minutes. A cat-repeller manual notes that fully changing habitual visits can take several weeks, so keep the devices in place and resist the urge to move them too quickly.

7) Prevent false alarms and missed detections

PIR motion sensors dislike harsh, direct sun glinting into the lens, heat vents, and areas where branches flap in the wind. Professional outdoor motion manuals advise aiming away from direct or reflected sunlight, and toward a path where the target passes across the field. Clear puddles or shiny surfaces that can reflect heat, and trim moving foliage inside the detection cone. If you must cover a sunny spot, reduce sensitivity and test again.

8) Keep the solar panel and lens clean

Dust, soot, and bird droppings reduce solar charging and can slow the sensor’s response. National Renewable Energy Laboratory guidance notes that soiling lowers photovoltaic output, and many product manuals recommend a soft cloth with mild soapy water for cleaning. Wipe the panel and the PIR window periodically, especially after pollen season or a dry spell. Avoid abrasive pads and harsh chemicals.

9) Seasonal maintenance that extends life

In long cloudy spells or winter, top up by USB. Some manuals suggest recharging after extended overcast weather or after storage, then returning the unit to service. If deep snow or flooding is likely, bring the repeller indoors until conditions improve. Replace rechargeables when runtime shortens. Follow the manual’s safety advice about handling and recycling batteries, and keep devices away from very young children who can sometimes hear part of the ultrasonic range.

10) Combine humanely with other garden tactics

A layered approach works best. RHS guidance lists electronic scarers alongside scent-based repellents and water-release devices, which means you can pair these solar units with light mulches on beds you want to protect, or a hose-based motion sprinkler aimed at a fence gap if neighbors are comfortable with that method. Always check for hedgehogs and friendly pets before adding a sprinkler to avoid unintended soaking.

Quick troubleshooting, based on real manuals and field use

If nothing triggers, raise sensitivity and confirm the red PIR LED is flashing on movement, then check that the batteries took a full initial charge. If you get too many triggers, reposition away from heat sources and waving plants, and lower sensitivity one notch at a time. If a persistent cat ignores one frequency, change to the next band and re-test for a week. If your own dog or a neighbor’s pup reacts, use a higher frequency band aimed for cats only, and angle the device to cover just the garden edge.

Why this method is worth the effort: independent research measured fewer garden incursions and shorter stay times when ultrasonic units were placed well, and respected horticultural guidance supports humane electronic scarers as part of a responsible toolkit. Set them up with care, give them time to work, and they can quietly hand you your beds back.

FAQs

1) Do ultrasonic cat repellents actually work, or is it a gimmick?

Short answer, they can work when placed and used correctly. Two peer-reviewed studies measured real reductions in garden visits: one field trial reported about a 46 percent drop in cat incursions and a 78 percent reduction in how long cats stayed, while an earlier study found a moderate deterrent effect that offered a partial solution for householders. Results vary by garden layout and cat behavior, which is why placement and patience matter.

2) How long before I notice a difference?

From user reports and manufacturer guidance, give it a few weeks. The RSPB’s page for CATWatch notes some cats challenge the device at first and that it can take up to four weeks for visits to taper off. That timeline aligns with what gardeners describe in forums when they install one unit and then tighten coverage with a second.

3) Will an ultrasonic cat repeller bother my dog or my kids?

Possibly, especially at lower ultrasonic ranges that overlap with human and canine hearing. Teens and many younger adults can hear high-frequency mosquito tones near 17 kilohertz, and dogs hear far above our range. Some manuals even caution about very young children. If sensitivity is high or the unit faces a walkway, neighbors might notice brief beeps, which you will also see discussed in neighborhood threads. Practical fix: select the cat-only frequency band, aim the head across the approach path and away from yards or play areas, and keep sensitivity just high enough to catch cat-sized movement.

4) Do these devices bother birds or hedgehogs?

The RSPB tested and approves CATWatch for protecting birds in gardens and notes that its output is targeted at cats. Their product page states the frequency is in a range cats dislike and that it will not bother other garden wildlife such as hedgehogs. If birds are your main reason for installing a solar powered cat deterrent, the RSPB-approved models are a safe bet.

5) How many units do I need for a typical garden?

Think in arcs, not acres. Most outdoor ultrasonic repellers cover a wide arc with an effective distance of roughly 10 to 12 meters in front of the head under ideal, unobstructed conditions. For example, the RSPB-approved unit lists a 12 meter range and about 125 square meters of coverage. In real beds with shrubs and fencing, two units aimed to overlap along the cat’s usual route outperform one.

6) Does the sound go through walls or fences?

No. Ultrasound travels line-of-sight and is blocked or scattered by solid objects. Multiple manuals spell this out, and brands advise aiming to minimize obstacles like walls, dense hedges, or furniture. Plan placement so the cat crosses the beam rather than walking straight toward the lens.

7) Why is mine triggering constantly, or not at all?

Outdoors, passive infrared sensors can false-trigger if direct sun hits the lens, when leaves whip in the wind, or near heat vents. Aim away from direct or reflected sunlight, trim moving foliage in the cone, and dial sensitivity down one notch at a time. If it never trips, raise sensitivity and re-aim so targets cross the beam. Security sensor guidance and user forums echo the same tips.

8) Will my indoor cats hear it if the device is outside?

Unlikely, provided your windows are closed. Manufacturers and rescue groups that teach humane deterrents note ultrasound does not penetrate walls and typically does not travel through closed windows. With open windows or screens, some sound can enter, so angle devices away from the house if your own pets are sensitive.

9) What about rainy seasons and sprinklers, are these waterproof?

Look for the weather rating. Many waterproof outdoor cat repellent units publish IP ratings. Some listings specify IPX6 for strong water jets, others IP44 or IP54 for rain. None are intended for submersion, so mount heads above standing water and avoid flood-prone spots.

10) Do solar versions work in winter or shady gardens?

They still work, although performance depends on daylight and clean panels. Research from NREL shows soiling like dust and bird droppings measurably reduces photovoltaic output, so wipe the small panel with a soft cloth. In long cloudy spells, use the USB top-up that many units provide. Short winter days may mean fewer activations per charge, which is normal.

11) Is there good evidence behind these, or should I try something else first?

There is evidence, yet it is moderate rather than magical. The studies above show measurable reductions, and the RHS lists electronic scarers alongside other humane tactics. In practice, gardeners often layer tactics: rough mulch or chicken wire on the soft soil cats prefer, plus an ultrasonic at the entry route, or even a motion sprinkler if neighbors are on board. That blend tends to shorten the time to results.

Final Thoughts

If you have read this far, you probably just want your beds back, and you want to get there in a way that is kind. The cat repellent outdoor two-pack you are considering sits right in that sweet spot. It uses motion to trigger short bursts of ultrasound that cats notice, yet it avoids harm, a humane approach that aligns with respected guidance noting electronic scarers and water-release devices as fair tools for protecting gardens.

You also asked for proof, not promises. Independent research has measured real reductions in visits and shorter stay times when ultrasonic units are positioned well, and evidence summaries reach the same conclusion, namely that these devices are not magic yet they do cut nuisance activity when used correctly. That mirrors what bird-welfare groups communicate around RSPB-approved products that focus their effect on cats.

So here is my field-tested plan. Start by placing the first head where cats actually enter, then use the second to close the blind spot so they must cross at least one clear arc. Keep lines of sight open, aim slightly downward, and choose a cat-only frequency band. Give the setup two to four weeks while you keep the solar panel and sensor window clean. If you need to top up by USB during long cloudy spells, do it, and when any batteries eventually reach end of life, recycle them properly through a local program, since regulators warn that tossing batteries in household bins can risk fires and pollution.