Hi all! I ordered such a tester and, in principle, I am satisfied with everything. I work mainly in server installation and video surveillance. Sometimes you need to work after someone if someone understands what I mean. He performs the most important function for me in full force. This is the correct RJ45 and SCAN pinout. When you have a bundle of 300 or more wires and you need to find a wire and ring it, the device copes without any complaints or problems. The main thing is to carry a house with you. A couple of batteries a crown. (this is certainly not FLUK) but it can work.