With its user defined tone output, up to four 402T Toner units can be used simultaneously for tracing multiple cables runs. As a continuity tester, the 402K provides both audible tone and LED display to indicate resistance levels. The unit will even identify the presence of AC or DC voltage on the cable under test.

The newly designed 402R receiver provides three methods of signal reception. Electrostatic pickup for non-terminated cables, electromagnetic pickup for terminated or shorted cables and direct connection when identifying in the presence of passive devices.