M175 Animal Repeller Ultrasonic Powerful Produces Very Loud Siren-like Pulsating Aggressive Ultrasound Sounds. Repels Rodents, Insects, Wild and Birds. With LED Indicators

So, this isn’t the sort of thing you want your neighbours knowing you’re using - it can be pretty brutal! I live at the end of a very quiet cul de sac and it seems to attract feral children that congregate on my front garden, they urinate and kick footballs around and despite trying to reason with them they still turn up and cause trouble. I was able to easily place this device discreetly outside a bedroom window and run the wires through an existing hole, plugged straight in and whenever there are masses of children congregating I switch this on…and they soon scarper. I genuinely didn’t expect results but on one occasion it’s even made someone vomit! I will admit the sound is awful, you can hear it pulsing inside even though it’s fixed outside, but it doesn’t need to be used often. It’s incredibly easy to use, the noise level and adjustment is excellent. It feels really well built too. It’s solved my issue but I do feel a bit mean using it! 🥴

Can't say much about this other than it has little effect. I've tried different frequencies but the local pests just seem to ignore it. If I reduce the frequency to where I can here it, it's not very loud. Probably wouldn't cause me any discomfort unless it was right against my ear. A waste of money.

We'd recently been plagued by a group of magpies "taking over" our garden, they were targeting the bird feeders and keeping all the smaller birds away. Bought this as a test to see if it would help. It's worked well. Whenever the magpies descended in force, I'd turn this on and point towards the garden. I wouldn't say it scared the birds, more a case of making them uncomfortable, and after a minute, they'd fly away. After only a few weeks, the magpies have moved onto other territory and the small birds are returning, so (currently) don't need to use it. It did exactly what I had hoped for.

Quality build product but pigeons are not bothered in fact they are attracted to it haven't test it on insects,cats etc. Build quality is perfect,same pest repellent on ebay is £50 so the price I paid is a steal! This ting is loud - very loud - so can't really test it on audible settings but ultrasonic doesn't work on pigeons.

this item dont have a mains adapter , cant connect to battery . i checked this with on frequencies i could not hear using spectra plus it indeed does put out a good strong signal at frequencies inaudible to me mainly from 19mhz upwards Unfortunately it does not have the desired effect on the cat i was trying to stop make a mess and dirty in my garden .It do not working. i am not happy for this item

Delivered on time, and appears to keep the rabbits at bay.

Seems to output ultrasonic waves but didn't deter rodents. Supposedly very loud; maybe our rats are deaf?

Product has no effect on birds or chicken despite trying different frequencies, locations, distances. Expensive but useless device. Postage was almost as much as the product yet took a long time and zero tracking once product has left Germany where it was sent from. Costly mistake to believe in claims made by manufacturer and past reviews.