USB Tester surprises that can go wrong

Modern USB-Testers have lots of extra ports and their use and internal wiring often not properly documented. There are a few easy traps when it comes to using and connecting common USB-testers like the UM25 or UM34 and clones which I reviewed earlier. In this video, I’d like to address a few of these in the hope to avoid disappointment or possible damage to your equipment.