The Megger TDR2010 is a handheld time domain reflectometer (TDR) that is used to locate faults in cables and other conductors. It has a range of up to 2000 meters and can measure the distance to a fault with an accuracy of ±1 meter. The TDR2010 also has a number of features that make it easy to use, including a large backlit display, a built-in help menu, and a USB port for data transfer.