The professional series Probe-Pro Tone Tracer traces non-active wiring when used with Toner-Pro Tone Generator (VDV500-063, sold separately). It features a responsive, durable, replaceable non-metallic, conductive tip and a work light for use in dark spaces. A headphone jack allows for headphone (not included) use in extreme noise environments. The terminal block confirms the toned pair has been located. https://elecena.pl/product/18352835/vdv500123-cable-tracer-tracing-probe 2021-05-05 https://elecena.pl/product/18352835/vdv500123-cable-tracer-tracing-probe 2022-06-20