PestbyeWaterproof Ultrasonic Repellent Cat Repeller and Scarer with Ground Stake (Battery Powered)

We were sceptical about this but desperate as our garden was getting pooed on every night. It has worked like a dream. We had set up a camera and could see that both cats and foxes were coming into the garden multiple times a night. Then we got this brilliant little gadget, set it up in the garden and, bingo, no more visits. We were a bit concerned that our dog would be worried by it but she has got used to it. 100% would recommend.

Apart from trying to screw in the small screws the rest was easy to put together. It has been working for last 2 weeks and have not seen any cats or cats poo.

I recently took-up slate chippings at the front of my house and replaced them with a Cotswold stone. I had no inkling that a couple of months later the neighbour's cat would suddenly decide to use it prolifically as a litter tray - eventually three times in four days leading-up to the installation of my new cat scarer. I read the reviews and chose the PestBye in the hope that this would resolve the problem!It arrived in a plain box (inside the usual Amazon packaging) with minimal instructions. It requires 4 AA batteries (not included) and it is fairly self explanatory to assemble, simply put the batteries in, put the rubber seal around the back and use the four screws to attach the battery cover. I couldn't get the battery cover to be absolutely flush and the screws wouldn't go all the way in and I didn't want to over-tighten at the risk of splitting the plastic, but with the rubber seal I think it should be waterproof (time will tell and I'll update on here if it isn't!).I am using it on a stake rather than attaching it to a wall (the stake was fairly easy to attach and drive into the ground - so that the unit was 4 inches above the ground). As it is only a small area I have reduced the sensitivity to the minimum level (and it still works fine). I am using the dial on the third frequency dot as per a very helpful review further down (which will tell you which frequency is most effective against which pest), it doesn't give any suggestion in any instructions. I have adjusted it so that it covers just the space in front of my house, it can cover up to 80 degrees.I am giving it five stars for the effect that it has had on the cat, who seems to hate it as I don't see it wandering around the front of my house anymore - but I would say the instructions are poor and I wouldn't say that it is fantastically constructed as the back doesn't `fit flush'. The neighbours children can hear it as well, so consider that if you want children to be able to play in that area.Just two points to note if you are buying:Make sure you have 4 AA batteriesMake sure you have a very small cross-head screwdriver to hand - easily purchased from any pound shop or DIY place***UPDATE***I've had it for 2 months now and it has worked a charm, not a single bit of cat mess! I've noticed that another neighbour has recently installed one to cover his lawn. I was told that some older cats go deaf and can't hear this signal - to sure if that is correct or not but the cats nearby seem to be fairly young so it isn't a problem for me.

Having read the reviews I had high hopes for this product which were crushed all too quickly. As soon as the batteries were inserted I could hear the unit squeaking and clicking at me, which probably should have been the first indication that things weren't quite right. After all the very definition of ultrasonic is a frequency above the range of the human ear. The three cats, who were sat in the kitchen at the time, looked on with interest mainly although the youngest (the one who is my nemesis) did seem the nearest to being upset by it and did eventually leave the room. I took this to be the sign that I'd found the ideal frequency and set the two units strategically in the borders giving me maximum range and waited. For 12 hours not a single visit occurred and I felt victory would surely be mine. The motion sensors picked up everything, in fact the range on the sensors appears to be the best function on them, however the claim that they work on an infrared level I would have to question as they would often be set off by the movement of a leaf or the flap of the laundry on the washing line. It was not long however before Sheldon (my tabby tormentor) came sniffing around ready to do his grotty little business in my tiny plot of paradise yet again. Aware that the instructions state that it will take 2-4 weeks for cats to take the hint I have persevered. These are not cats that have grown up untrained in the use of the litter tray and nor is their tray left to fester until it stinks out the entire house. No these are cats whose conveniences are probably kept cleaner that most humans are and short of chasing after them all day with a pristine tray and a bucket of moist wipes to clean their little botties with after there is little more we could do to make their motions more comfortable. So it is with a heavy heart and a huge sense of disappointment that I have disassembled these units after several weeks of patient anticipation and experimentation with the frequencies. Even before removing the batteries and packing them away I have experimented with the cats in the kitchen once again. This time one cat got so upset he sat down nonchalantly, raised his left leg in the air and casually licked all that the vet was kind enough to leave him with. Strangely though it is my thirteen year old daughter who is happiest to see the back of these items as she couldn't sit out in the garden without them giving her a headache. So there you go, it's a one star rating from me. Partly because they won't let you rate it a zero and partly because if your teenagers are leaving little parcels in your petunias then this will surely stop them.