we've had this plugged in for a few weeks now seems to be working,not seen any sign of them. it does take at least a week before you notice a difference. would recommend this. we got it on the landing tried the night light but its so bright it scared the kids!
bought this as a mouse repellent orrible things got upstairs. l think it has worked put few drops on cotton wool& put some in each room.not seen any mouses since, only draw back my house smelt like a giant polo!!!