Network Cable Tester NF-8209 Wire Tracker Network Tool Scan Cable Wiremap Tester CAT5 CAT6 Cable Length Measurement, PoE Testing, NCV Function

This cable length tester is a mixed bag. There is no way to calibrate it, which may be a concern, but it is easy to use and generally works well. However, some reviewers complained about flimsy material and malfunctions. Others say it works perfectly and is great value for the money. It's also noted that the power button on the probe is easy to accidentally turn on. Overall, it's a functional tool for tracing wires and testing continuity, but there are some concerns about its longevity and durability.