Klein Tools VDV500-223 Digital Tracing ProbeKlein Tools VDV500 223 Use the Klein Tools Digital Tracing Probe to trace cables and wires on active and non active networks when used with the Digital Tone Generator (Cat. No. VDV500 163; 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. Features Digital Probe traces non energized