LJCMN Mouse Repellent Ultrasonic Plug in, 360° Mice Repeller Indoor with 4-in-1 Pest Squirrel Rodent Deterrent Device for Attic House Garage Basement

After reroofing, persistent squirrels chewed back into our roof, despite new hard insulation (not the soft, comfy stuff they had previously enjoyed). Most outdoor repellers are solar-powered but that would not have worked here. So I tried this one outdoors, even though it's designed for indoor use. Instructions say it won't go through lumber, but it did in this case. The first night, the squirrels shoved it, moved it a bit, and chewed it. They obviously didn't like it, but it still worked. In less than a week, the squirrels were gone.

Seems to work well

We have seen rats literally sitting on top of this device, with indicator light on. No effect on the rats whatsoever.

Easy and simple to let you know not worth it doesn’t work

Its very clear and does what its supposed to but I am not sure if it helps with the rodents behind the wall. I am going to keep monitoring it since I just purchased and hopefully it gives what I need and that is to run them off from behind the walls of my home.

I got this for the cabin. The random ultrasound noise and the flashing led lights are intended to make it unpleasant for rodents, so we'll set it up while we're gone. There's a test mode to prove it's working and 3 ultrasound modes to choose from. Also, bright lights. Surprisingly, my hearing aids can hear the noise, and it is annoying . We'll give an update on its effectiveness.

Good then great

High tech device to scare away rodents with flashing strobe lights (extremely bright) and ultrasonic sound. Easy to understand directions and you can choose to activate or deactivate the strobe lights incase you want to leave it in your room when you are sleeping you wouldn't be bothered by the bright flashing lights. I like that there is an option to shut off the lights on the device