The Platinum Tools T130K4 VDV MapMaster 3.0 Field Kit combines comprehensive test functions cable mapping, tone generation and length measurement capabilities into one compact, portable test set. Easy to use for commercial or residential installation troubleshooting and maintenance on telco, network or coax cables. Fast, intuitive 3.0 tester tests to T568A/B configurations and detects and displays opens, shorts, miswires, reverses and split pairs on an easy to read backlit LCD screen with large icons. Capable of single end testing for shorts or split pairs and measures cable length in feet or rmeters. Functions include ability to flash Port Link Light and audible tone generator with 4 selectable cadences. Whether your jobs are commercial or residential, the versatility and added features of the VDV MapMaster 3.0 Field Kit makes it a best value cable verifier for the professional installer!