The problem was that the instructions said, not to use it near a cooker or a washer or a heater, or in a bathroom, or in a cupboard. Then it said that many objects or walls or floorboards will prevent the sonic detterent from reaching the rodents. Not many wall plug sockets left to plug it into, in order for it to work. I am trying to solve these issues by using an extension in order for the device to be able to do it's job, by moving it away from large furnishings or objects in it's path. It looks as though it was well made, and there are no fiddly bits. I hate using poison or traps, so I want this item to work and I am willing to wait a little while for it to work properly, and I will update this review in a few weeks time, when I have some evidence that the little creatures have despatched.