Hobbes 256713A-R Signal Generator and Trace Probe Kit eable telecom, datacom and alarm and security installers to easily trace cables and wires at any location. The Hobbes 256713A-R Signal Generator and Trace Probe Kit warns of problems with continuity, identifies faults in wires, checks polarity and voltage in LAN or telephone lines. Hobbes tone and probe kit gained an excellent reputation among network techs and installers, as it provides fast and accurate wire identification and tracing.