As a system and network administrator, I use this tool a lot. It works exactly as intended and I couldn't be happier with it. The detachable loop saves lives and allows me to test from a wall outlet in a room to a patch panel in the main electrical panel. The connection cable and clips are in the same place as the tester itself in the travel case. I was also surprised by the battery life, it is very good. Extremely easy to use and even identifies crossed or split pairs. Should be in every network tool bag.