ZHENROG Ultrasonic Pest Repeller 4 Pack Upgraded,Electronic Plug In Pest Control Indoor Use,100% Safe Repellent Pregnant women and babies available，Anti Rat/Spiders/Ants/Cockroaches

SECOND UPDATE: Now mid April and no signs of mice. I would recommend this product.UPDATE: One week on and the mice have stayed away. I am delighted.I live in a ground floor mid terrace flat in London. I have been waging war on our mice for years. I’ve tried everything, except these devices - I didn’t think they would work. Anyway, they arrived today. I plugged in 3, and then sat in silence to see what would happen. After just a couple of minutes I could hear them under the floorboards and in the wall! The activity continued for about 15 minutes and then complete silence. I can’t believe it. Should have bought these years ago.I’ll update this review if the little buggers return. But fingers crossed this did the trick.

This is one of the best repellent I've ever bought. I've been using it since the day I received it, because I had mice running around my house. I can now say that after a week of using it the mice seem to have disappeared and my house is mice free again. I'll be keeping this plugged 24/7 to prevent further infestation

Plugged it in 3 days ago but so far no change, Ratty still in the garage. I understand it may be 2 or 3 weeks before I see results so I guess it's early days. I will update my review in a few weeks and hopefully award 5*.Update 14th MayRatty has moved out. However, I can't be certain if the device made him leave or the fact I found and removed a bag of apples he had been gorging on. The main thing is he's gone so I've updated my review to 4*.

It’s a four pack, so I made my attic a minefield for those mice that made the noises during the night for weeks. It takes a few days to do their magic, but after that the strange noises are gone. I’m happy now, and most importantly my wife is happy as well

Arrived promptly and slightly different to those illustrated. I love the range of tones and the loud volume, however one of the receivers stopped working a few weeks after purchase. I planned to return it but misplaced the mini tools that accompanied it, so couldn't return the set incomplete. I now have to remember to move the working receiver around the house to ensure I hear it. Would have given the seller the opportunity to replace the faulty one, but no option to contact seller is provided.

I was looking for a way to get rid of rats in my garage in a "relatively" humanely way, without risk to my cat and dog, and these seem to tick all of the boxes. You have to remember that the ultrasonic waves travel like light, so there cannot be anything in front of the them as they will block the waves. So far after a week, there has definitely been a reduction in rodent activity and hopefully this will be consistent in the long term and the rats do not become desensitised to the repellent.

I have been using these pest repellers for a few days now.and i must say they re really impressive.my problem of having rodents have completely gone.definitely 5 stars for me.If anything changes in future i will update this review

Works perfect, had it for a few days, bought for my shop, we have a storage where the rats comes in and out, these seems to help, hopefully there will be non of them in few weeks time .