I don't have mice, or roaches so I can't honestly say Yes it does work, I have to say this is the easiest pest control ever, just pop open the package, plug it into a wall outlet, and you are done. The gadget makes no noise, there is just a little green light on the front of it that kind of pulses. I do like the fact that there are no poisons, no traps, no chemicals, and no insecticides, I have small children and pets running through my house all the time, it's nice no to have to be vigilant on making sure no one goes near this, if they do it won't harm them.
The package says it will get rid of Rats, mice, roaches, mosquitoes, and other pests. I live in Florida and there are all kinds of bugs. This uses ultrasonic waves to repel pests The package does say not to use it around hamsters, gerbils, mice, or other pet rodents. It is 100% safe for dogs and cats.
I got this in exchange for my honest opinion.