Campfire Stuff New 4-Pack Ultrasonic Pest Repeller - Electronic & Ultrasound, Indoor Plug-in Repellent | Anti Mice, Insects, Bugs, Ants, Mosquitos, Rats, Spiders, Roaches, Rodents - Child & Pet Safe

Was hopeful these would actually work but they absolutely do not do anything. We are overrun with spiders and ants and have had no lessening of them since plugging these in. Purchased the 4 pack even though only have a small apartment as I thought it might be even more effective. Can sit and watch the bugs crawl across the unit while plugged in. Too bad, was so hoping these would do something for our problem.

Waste of money...Don't bother. I saw a mouse running in my garage and figured I would see if these worked. I had 2 of these in my garage for over a month and would find droppings in places that I previously cleaned .... traps and bait stations are the only way to get rid of the critters.

I have tried these inside to solve a little issue we have this time of year with moles and small mice, and there is a negligible effect at best. Outside? Forget about it, they don't do a thing. I tried them out by a camp fire, in my garage, both with the doors/windows open, and closed, and they didn't work one bit, unfortunately.

Well... I was waiting some time according with the suggestion of the manufacturer but it has been more than one month and still we see cockroaches, flies, mosquitoes and bugs. I don’t recommend this device.

OMG! I didn't think they were working because it took a few weeks but Wow!, all the mice in my house are gone. I wish I had solar power so I could put one in the shed.

they did not work at all. The small light says that it is on but I cannot tell for sure if they are making the sound that they should be making. There were three in one room where we know the mice are, they did not even care. I think I wasted my money.

Not sure if they work but one did short out tripping the breaker about a month after I installed themMay or may not work. I really didn’t see a difference

It’s been almost 4 weeks today since I started using the units. We have spider issues at home and saw spiders still crawling in front of the unit with no issues for minutes so we had to remove them on our own. We have seen a couple of dead house centipedes in front of the unit in the basement though. I guess it works with house centipedes. I think I will return them.