NOYAFA Advanced Cable Tester with Wire Tracker PoE Multifunction Network Cable Tester for Toner, Tool Kit with Audio Probe Bag for LAN CAT5 CAT6 Tracker

Very bad

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Seems pretty good for the money. I wished that I had skipped cheap and basic cable testers. I had a break in a 50m cable run and wanted length testing - which worked surprisingly well on this tester. It did over state the total cable length a little but it did help me find the damage. Note that only one end of the cable needs to be plugged in to the tester and the other end left unplugged. I have seen a one review that suggested both ends of the cable need to plugged into the tester, which is not the case.

As I'm not the best installer, I had 3 cables that I'd run through my walls work poorly or not at all. I was using shielded cable (in my amateur radio station, where there's lots of electromagnetic energy present) and I was happy to see that it tested the ground connection as well as the 8 conductors. The continuity test is most useful, where you plug the supplied passive device into the far end and it tells you which wires failed, or were wired incorrectly, or if the ground is not conducting. The TDR function which measures cable length can sometimes help with identifying which end is in error. I had one connector where the wires weren't pushed in all the way and the TDR said this was an open circuit while the other end it was the expected cable length. Another cable that must have had marginal contacts showed the correct lengths at one end, and several different lengths at the other. Replacing the latter connector was the correct choice. I had one socket that had the middle (blue) pair reversed. The continuity test found that straight away, and after inspecting the plug at the opposite end and seeing it was correct, opened up the wall panel and corrected it. There is also a function to identify cables using a (powered) wand which emits an audio tone when near the cable that the main unit is plugged in to. This is another handy feature for narrowing down problems, although for shielded cable you need to have the wand near the connector rather than anywhere along the cable. All in all I fixed everything in a single afternoon, after having them in an unusable state for over a year. So it was money well spent. The unit comes with a little carrying case, and some short cables for testing RJ45, RJ11 and bare wires using alligator clips, and batteries for the two units that need them. The manual is clear enough, although does suffer from somewhat poor use of English. I'm very glad I bought this unit and it works as advertised.

He probado de infinidad de marcas conocidas y éste funciona genial y es muy barato

This kit was perfect for wiring a home surveillance and network with a reel of CAT6 cables and terminals. I mis-wired one AP cable THREE times in a row! If it weren’t for the device it would have been a headache. The scan wand is very useful, too. Helped me identify and label a number of cables that lost their labels during their transit in the conduits.