The high-tech LANsmart TDR Cable Tester detects locates and displays basic wire connection problems including opens shorts miswirings and split pairs for RJ45 Cat5 Cat6 utp and STP. Plus it measures cable length using TDR (Time Domain Reflectometer) technology in real time. LANsmart displays the results in a pin-to-pin format. LANsmart will also generate tones to help find the corresponding cables; users can send out auto negotiation signals to find the corresponding hub/switch ports. LANsmart is compact ergonomic and easy to operate. Its advance functionality and versatility make LANsmart an all-in-one tester suitable for all professional technicians and installers.