Gecool A-MT09-B 4-Pack Ultrasonic Pest Repellers, 4 Modes

Pack Repellers: Gecool A-MT09-B is a four-unit plug-in ultrasonic pest repeller set with four selectable modes, including a silent setting. The listing claims up to 1,200 sq. ft. (111 m²) coverage per unit and recommends one in each room, so treat the coverage figure as a per-device claim rather than a whole-home guarantee.

At a glance

Four selectable modes, with silent, low-sound and maximum-output settings described in the listing.
Listing claims ultrasonic waves and electromagnetic pulses, with an ultrasonic frequency range of 20–65kHz.
The listed coverage is up to 1,200 sq. ft. (111 m²) per unit. The listing recommends placing one unit in each room.
The LED colour indicates the selected mode: blue for silent, yellow for low sound and red for maximum output.

Price

£20.99Save 16%

Reference price: ~~£24.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Four units can be placed in separate rooms, matching the listing's recommendation to use one per room.
A silent mode is offered for quieter use, alongside low-sound and maximum-output settings.
The stated coverage is given per unit, which helps buyers plan placement room by room.

Technical specifications

7 specifications

Identity
Brand	Gecool
Model	A-MT09-B

Operation and coverage
Modes	4 modes
Ultrasonic frequency	20–65kHz
Coverage per unit	1,200 sq. ft. (111 m²)

Dimensions and installation
Dimensions listed	25.4 x 25.4 x 25.4 centimetres
Plug	UK Plug

What to know before buying

The listing describes continuous use and says pest activity may initially increase during the first 1–2 weeks, with a claimed reduction by weeks 3 to 4. These are seller guidance and expected results, not independently verified outcomes.
The listing calls the product pet-safe and describes its materials as flame-retardant ABS, but provides no supporting test details. Buyers who need verified safety information should confirm suitability for their household and pets.

Who is it for?

A good fit for

Households wanting four plug-in units to place in separate rooms.
Buyers who want mode choices, including a silent setting for quieter use.
People considering an ultrasonic repeller as an additional household pest-control measure, rather than relying on a guaranteed result.

Less suited to

Buyers requiring independently verified pest-control performance or confirmed safety testing.
People seeking a single device with independently established whole-home coverage.

Gecool A-MT09-B 4-Pack Ultrasonic Pest Repellers, 4 Modes · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.9 / 5 · 18 ratings

5 stars87%87%
4 stars13%13%
3 stars0%0%
2 stars0%0%
1 star0%0%

There is no customer-comment summary in the supplied evidence. The aggregate ratings are strongly positive within a small sample, but they do not reveal what buyers liked, whether performance was consistent, or how the units worked in particular rooms. Treat them as limited rating context rather than evidence that the claimed coverage or pest-control results are established.

Frequently asked questions

How many units are included?

The product title describes a four-pack. The listing gives coverage per unit and recommends using one in each room.

What modes does it offer?

The listing describes four modes, including silent, low-sound and maximum-output settings. It does not explain the fourth mode in the supplied details.

What coverage does the listing claim?

Up to 1,200 sq. ft. (111 m²) per unit. This is a listing claim, not independently verified coverage.

How quickly should it work?

The listing says activity may increase during the first 1–2 weeks and claims reduction by weeks 3 to 4. It recommends leaving the units plugged in continuously, but does not establish a guaranteed result.