Check the listing for details. Klein Tools VDV500-123 Probe-PRO Tracing Probe. Condition: New. Listed at 44.99 USD. Klein Tools VDV500-123 Probe-PRO Tracing ProbeThe 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.Traces non-energized wiring when used with Toner-Pro Tone Generator (VDV500-063, sold separately)Responsive, durable, replaceable non-metallic, conductive tipWork light for use in dark spaces3.5 mm headphone jack for noisy environments (headphones not included)Terminal block on probe to confirm the toned pair has been locatedTool-less, twist-and-lock replacement tip (VDV999-068) availableOne push power button with power-on LED indicator - no need to hold button downAuto power-offLow battery indicator4 x AAA batteries includedIncludes a loop for a lanyardWorks with Klein's Scout Pro, Lan Scout, Jr. and Commander series of testers