Use Klein Tools Digital Tone Generator for wire identification, wire tracing and wire pair identification. When used with the Digital Tracing Probe (Cat. No. VDV500-223; sold separately), you can trace and locate cables on an active network and wire map to check pin-to-pin connections with shield detection and features angled bed-of-nails (ABN) clips to securely attach to wires. Use the RJ45 port to easily test RJ45, RJ11 and RJ12 data cables.