PestBye Battery Operated Cat Repeller - Ultrasonic Cat Scarer


  • Includes motion sensor.
  • Covers an 80 degree arc, to a distance of up to 23ft (7m).
  • Fully waterproof.
  • Requires four AA batteries (not supplied).
  • Dimensions: Height 10.5cm, Width 10.5cm, Depth 4.7cm.

The Good

  • Works well for the majority of customers.
  • The movement sensor preserves the batteries as it activates only when it senses movement.
  • Reasonably well made. No problems with water ingress into the battery compartment.

The Bad

  • No on-off switch to stop it coming on.
  • Needs to be positioned carefully to be fully effective.

Customer Comments

I wasn't sure if this cat repeller would work but going on the reviews thought it worth a try. We had a neighbour's cat which had been coming into our garden for some time and using it as a toilet. We have just re-planted and it was really annoying that the soil was being dug up every day. So time to try this cat seemed to work immediately which was surprising as the instructions said it may take two or three weeks to work for a long-term visitor. The cat has been seen around the garden but has not ventured into it from day one. The soil hasn't been disturbed anywhere in the garden so am really pleased so far having only been used for just over a week.
The only slight drawbacks I found was that there's no on-off switch to stop it coming on while we are in the garden moving around, and the battery compartment requires a very small screwdriver to undo the back. Otherwise really pleased and it does work (I've put it on setting 4 with a medium sensitivity).

Update 27/11/12 :- Well, have been using this for a good while now and is still working perfectly. I've used rechargable batteries and have only had to recharge twice in the best part of 18 months. For those who find it doesn't work, all I can say is I don't know why unless it isn't positioned correctly or is set at an incorrect setting - mine definitely works. I have just bought another one to position in a corner of the garden that can't be detected by the first one (behind a wall), where the cat has started to mess but no sign of mess in the main garden area still.

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As many other reviewers, I found it fiddley to assemble. Battery cover screw holes had to be enlarged before accepting self tapper screws. Common complaint, assembly information detail given (simple anyway, apart from being awkward). The important part where a bit of help is required, i.e. operating instructions were non existant.
These it turns out are available on [...].
The repeller actually works. I got rid of a persitant visitor after about five days. It required a bit of setting up in right posistion. I would say that the Pestby is most effective in a small garden. To save you hunting, details of operating info attached below.

The Cat repeller is the quickest fix for cats in the garden. Battery powered, it's easy to install by pushing into the ground using the stake supplied, or it can be screwed to a wall or fence.
Fully waterproof, it can be left out in any weather.

Why the motion sensor?
The repeller comes complete with an infra-red (PIR) motion sensor which turns the device on when a warm body enters the controlled area. This has an important purpose other than saving battery life: researchers have found that cats can become desensitised to the noise if they realise that random sounds are not associated directly with their presence in the controlled area. With the motion sensor, the cat learns to associate the noise with its own movement and is much less likely to stop being afraid of the noise.

Frequency Settings
This repeller device allows you to change the output frequency, enabling you to have the most effective solution for your particular pest problem. Listed below are the types of animals that this repeller can be used against and the most effective setting for each.

Working from left to right (from the smallest dot to the largest)

Cats - Between 3 - 5
Dogs - Between 3 - 4
Foxes - Between 3 - 6
Squirrels Between 2 - 7
Rodents - Between 2 - 7
Insects - Between 2 - 7
Roaches - Between 9 - 11

N.B If set on numbers one or two the chances of humans being able to hear this are greatly increased.
Requires four AA batteries. Battery life depends on how many times the device is activated, but they typically last 3-4 months assuming 10 activations per day.Batteries are not supplied as standard but we can supply them (see options above).

What area does it cover?
It covers an 80 degree arc, to a distance of up to 23ft (7m), giving a total unobstructed working area of 184sq ft. Unlike most other repellers this allows you to cover a smaller area with the sensitivity dial. The repeller will give you the full 7m if the dial is fully round to the right to decrease the distance turn to the left, this will help to increase battery life as the repeller will cover the distance you want it to.

How quickly will it work?
If cats have a habit of feeding and fouling in your garden, it can take 14-28 days to deliver the full deterrent effect. 'Occasional' visitors will usually be stopped within 7 days. If you have a dog, the dog may be affected if it is allowed in the same part of the garden. The sound doesn't travel well through walls and fences, so it won't affect a dog in the house, or a neighbour's dog. Of course, as with all methods involving animal behaviour, we can't guarantee effectiveness in every situation, however, our own experience and the feedback we get from customers suggests that this device is effective in almost all situations.

Will it affect birds?
Not at all - you'll be able to welcome the birds back to your garden.

Occasionally, children and some adults may be able to hear this device. If this happens it will usually only occur while children are in the garden.
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This just didn't work for me. I installed fully charged batteries, set the frequency to 4 to target cats (the instructions say " Cats - Between 3 – 5 " and set the sensitivity to low so it would trigger when the cat was right in front of it, although it was just round a corner so that was bound to be the case anyway. So I watched the cat on my nightvision cctv camera to see what would happen. It walked right up to the device, which definitely triggered as I could see the sensor light come on. But the cat had no reaction whatsoever. It just carried on sniffing around the area about 18 inches in front of the device and finally wandered away at a slow walk. There's nothing wrong with the cat's hearing as it can hear me shouting at it well enough!