Klein Tools Probe-PRO Tracing Probe features a built-in terminal block that helps confirm the correct toned wire pair has been located, reducing unnecessary guesswork during cable identification. A 3-1/2 mm headphone jack improves signal detection in noisy jobsite environments, while the tool-less twist-and-lock tip replacement simplifies routine maintenance. Powered by four AAA batteries and equipped with a convenient lanyard loop for easy carrying, this durable tracing probe delivers reliable performance for residential, commercial, telecommunications, and structured cabling applications where accurate wire tracing is essential.