Hi,
Ok just been having a play with this and I have to say its amazing, worth every penny, got the Mrs to snip the neutral in a bit of twin and earth not the earth or live, just one conductor, so just enough to break it.
Then put it under a mat.
Then i connected the ends as it says, so unused conductors to earth, and into the device, then connected one end to the neutral at the end of the cable, turned the receiver on, moved it around over the mat, then flicked it on to manual mode, within 30 seconds, I had found the exact spot under the carpet where the neutral appear to be cut or not transmitting any further.
What more can I say, its bloody amazing!
Ill be making a video of this basically to demonstrate it, Ill demo this and another function and then let you know, ill do it this week when the mrs and baby goes out so they are not sniggering in the background at me being all dorky!
Anyway, highly recommended, best gadget I have by far!