Ultrasonic bird repeller: what to check before you buy

Updated: October 2026

You have pigeon mess on a balcony rail, or starlings in a soffit, and a plastic box between about £10 and £41 looks simpler than netting.

You have pigeon mess on a balcony rail, or starlings in a soffit, and a plastic box between about £10 and £41 looks simpler than netting. An ultrasonic bird repeller on amazon.co.uk is sold as high-frequency sound that is meant to move birds on. This page says which listing lines are worth reading, and when the job is a ledge rather than a speaker. Prices and star lines are from this comparison’s amazon.co.uk extracts, dated 16 October 2026. Peter F. did not run a lab test. The product table is on the ultrasonic bird repeller comparison.

Our top picks

Badge	Product	Frequency	Power	Weather	Note	Price	Offer
Best overall	ISOTRONIC ISOTRONIC 70628 1 unit	No kHz printed	6 AAA	No IP code	6.1	about £32.45	View offer
	ISOTRONIC ISOTRONIC 92405 1 unit	No kHz printed	6 AAA	No IP code	6.4	about £32.45	View offer
Preis-Tipp	bergxperten bergxperten solar IP65	20–50 kHz	Solar	IP65 claimed	5.5	about £22.99	View offer

Best overall

ISOTRONIC ISOTRONIC 70628 1 unit

6.1/10about £32.45

View offer

Rank 2

ISOTRONIC ISOTRONIC 92405 1 unit

6.4/10about £32.45

View offer

Preis-Tipp

bergxperten bergxperten solar IP65

5.5/10about £22.99

View offer

On this page

1.What ultrasonic means on these listings
2.What the UK evidence actually says
3.Power, weather and the review line
4.What to do instead of trusting the area claim

What ultrasonic means on these listings

Ultrasound is sound above about 20 kHz. Several boxes here print a band that starts well below that. The SLAJMNZH dial at £31.99 says 5–30 kHz. Two solar SLAJMNZH listings at £21.99 say 8–35 kHz. Only the bergxperten solar unit, at £22.99, prints a floor at 20 kHz (20–50 kHz). The Isotronic bullets do not print a kilohertz figure at all. A band that includes 5 or 8 kHz can be noise you, a child or a dog notice. If the listing itself says some tones may be audible, believe that sentence. Who each listing is for sits on the best ultrasonic bird repeller UK page.

What the UK evidence actually says

Defra’s non-lethal review says ultrasonics are ineffective or unsafe for birds. It cites a feral-pigeon trial that found no effect, and it says there is no biological basis for scaring birds with sound above 20 kHz. The Advertising Standards Authority has not accepted efficacy claims for ultrasonic or electromagnetic pest devices. A testimonial on a product page is not that trial. Which? says ultrasonic deterrents worked well in its garden testing. That note is about garden crops, not a pigeon field trial, and it does not overturn the Defra annex. Isotronic 92405, at £32.45, is the large separate sample here: 2.6 from 2,112. The two listings that both show 2.6 from 6,144 are one shared pool.

Testsieger

ISOTRONIC ISOTRONIC 70628 1 unit

6.1/10about £32.45

View offer

Power, weather and the review line

The Isotronic AAA boxes claim about three months or about eight months. Reviews on 92405 often say one to three weeks, including with Duracell. Solar units at £21.99–£22.99 need daylight, and their USB backup has no hour figure. The bergxperten unit is described as switching off at night. IP54 and IP65 on these titles are seller codes. A bergxperten review says the item is not waterproof. Isotronic reviews describe rain through the switch or the speaker, and those listings have no IP code. Twenty-four mixed reviews at 2.5 tell you more about failure than a lone 5.0.

What to do instead of trusting the area claim

Do not treat 40 m², 50 m² or 370 m² as a measured area a pigeon will leave. One 92405 review says the instructions limit outdoor range to about 4 m with a clear line and nothing in the way. If the bird must not land, the speaker does not remove the perch. Blunt spikes, wire or taut netting are what the RSPCA, Natural Resources Wales and Historic England describe for ledges. Do not use ultrasound where bats roost. The Bat Conservation Trust says ultrasound in or near a roost may be an offence. If the sample is thin, the band is audible, or the weather claim is already contradicted, leave the category.

Common questions

Do ultrasonic bird repellers work on pigeons?

Defra’s annex says a cited pigeon trial found no effect, and that most birds are not shown to hear above 20 kHz. In this set the large Isotronic samples sit at 2.6, with both short improvements and pigeons sitting on the box. A 5.0 from one to three reviews does not overturn that. Do not buy on the expectation that a balcony will be cleared.

What frequency should the listing print?

Look for a kilohertz band and notice where it starts. Ultrasound is above about 20 kHz. Bands such as 5–30 kHz or 8–35 kHz include sound people and pets may hear. Only the bergxperten listing here prints a floor at 20 kHz, and a review still says children could hear it. Isotronic bullets in this set do not print a kilohertz figure.

Will I, my dog or a child hear it?

You might. Bands that start at 5, 8 or 13.5 kHz overlap ordinary hearing, and the LSJXHAIK listing says some settings may be audible to people and pets. A bergxperten review says children next door could hear a 20–50 kHz unit. Pet-safe is not a hearing test, and it says nothing useful about bats.

Solar, USB or AAA cells?

Solar at about £22 needs sun, and the USB backup on these pages has no stated runtime. The bergxperten unit is claimed to switch off at night. AAA Isotronic boxes claim months, while 92405 reviews often report one to three weeks. Choose the source you can reach where the unit will hang, not the longest number on the title.

Is IP54 or IP65 the same as a waterproof test?

No. A bergxperten review says the unit is not waterproof despite an IP65 title. A review says the 5–30 kHz leaflet says keep it dry. Isotronic files have no IP code and include leak reports. If reviews already contradict the badge, do not leave the box in the rain to check.

Why is 5.0 from two reviews next to 2.6 from thousands?

A 5.0 from one to three texts is a handful of buyers, not a larger test. The 2.6 from 2,112 on 92405, and the shared 2.6 from 6,144 on the other two Isotronic ASINs, include leaks, short battery life and birds on the housing. Do not add the two 6,144 counts. They are the same texts.

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