Two part cable tracer features single or multi-tone signal, 2 test leads & a 4 cond. RJ-11 MOD cable. Tone generator sends signal into cable that can be traced by probe. Generator features: Tri-color LED for line polarity, continuity and voltage testing. 12in Red, Black, phone leads, Single/multi tone selection, Mode switch. Probe features: Non-conductive, inductive tip, Adj. volume level, Sound/visual/both modes for noisy or dark work areas. Probe works with any existing tone generators. Both use 9V batteries. Includes carry pouch.