The high-tech LANsmart TDR Cable Tester detects, locates, and displays basic wire connection problems including opens, shorts, miswirings, reversals, split pairs and shield continuity for RJ45, Cat5, Cat6, UTP and STP. Plus, it measures cable length for UTP and STP cable without remotes by using TDR (Time Domain Reflectometer) technology in real time. LANsmart displays the results in a pin-to-pin format.