Mice on the ceiling of the cottage were making noise and not letting us sleep, they disappeared as soon as it was plugged in. Its placement in their activity area had preceded.

IMPORTANT: Read the instructions and adjust it for the specific rodents or pests you want to repel. It requires a different setting for mice and a different one for cockroaches, for example.

Very good, it does what it promises.
After a month of use, mice that I couldn't get rid of just disappeared.

I am very satisfied. I use it in a warehouse where we had a big rodent problem despite our efforts with medications for two years. It does what it is made for. The mice disappeared in a month. I bought one for my country house and a third one for my brother's warehouse.