Providing clients with proof that your work is installed properly is becoming more and more commonplace. Companies spend a lot of money to have networks installed in their offices and they want some guarantee that things are what you say they are. The Byte Brothers Real World Certifier does exactly that. In some respects, the RWC1000K is similar to the LVPRO3 that I reviewed last week. What I mean by this is that it will identify split pairs, distances to open/shorts and give you an accurate cable length.