Handheld LAN cable mapping and troubleshooting tester indicates all common wiring faults including split pairs, shorts, opens, reversed pairs and crossed wires. Graphical and digital display of fault data and length. Active remote unit indicates Pass/Fail by green/red LEDs. Indicates distance to opens and shorts and identifies location. Display fault location up to 500 ft. Built-in tone generator for tracing and locating cables. Built-in service check function to detect telephone, 10BaseT, 100Mbit+ and token ring. Visual and audible warning of live telephone network voltages. Large blue backlit display. Includes: Meter, remote unit, two patch cords, four 1.5 AA batteries, soft carrying case and user manual.