The Triplett WireMaster XR-5 tests 5 common LAN and Computer cables. It tests installed cables or patch cords with RJ-45, RJ-11, 1394, USB, and BNC connectors. It is intended to test cables with straight through connections not cables with reversed or transposed connections like some LAN crossover cables or reverse wired telephone cables. Tests shields in 1394 and USB cables. High or low pitch tracer tone. Fast or slow LED sequencing. Local or remote test mode on receiver. Fast or slow LED sequencing. Local or remote test mode on receiver. The WireMaster XR-5 includes: BNC terminator, BNC, RJ-11 and RJ-45 jumper cables, padded, cordura carrying case, 9 volt battery, instruction manua. The WireMaster XR-5 checks for: continuity, miswiring, opens, shorts, crossover, grounding.