Works great. Was able to test the cables I created.

I upgraded my internet service from 100Mbps to 600mbps. When I ran speed tests on my wired desktop, I was still maxing out at 100mbps. I ordered this tester to test the patch cables I had created several years ago. There were 3 cables between my desktop and my modem. What I discovered was network cable RJ45 connections are forgiving up to 100mbps. I found a problem on all 3 of the cables (crosses, opens and shorts). Apparently 3 of the 4 pairs can have continuity and you can still hit 100mbps. It's when you need to go >100mbps, you need to have all 4 pairs perfect and this tester helped me find the problems. I did not have the issues with the tester staying on as one reviewer had. It auto powers off after you run a test. My only complaint is the 9V battery cover has a screw and is not convenient to open. With 9V powered devices, I usually flip or disconnect the 9V battery when I'm finished using it to prolong battery life.

Works Great and it’s easy to use. You get a quick conformation if the cable your testing passes or fails. It will also tell you if it’s open, shorted or crossed.

This is second one that I am using at another location. The first one has fulfilled all needs for years and has worked flawlessly.

Simple to operate
very useful, without it I dont know how its possible to get it done

I was hesitant in buying a tester, since the "test" is just plugging the cable in. I'm glad I did. I found an intermittent short by wobbling the DIY cable plug end when testing. I may have never found this issue otherwise.

Great product.... quick devilry and cheap.
Would be happy to use again ??

Simple device to appears to work as expected.

Cheaper than a Fluke.

I finally purchased this cable tester after I discovered a data error was the result of having a bad connection. In the past I just assumed all my crimp or punch down connections were good, but that is definitely not a safe assumption. I highly recommend this tester as it quickly and easily lets you know if there are any connection problems.

This tester has issues. You cannot turn it off. The thing is supposed to turn off automatically, but I did not witness it turning off the time I used it. I went to bed and it was still on in the morning! I checked it when I got home from work the second day I had it, and it was finally OFF. Why don't they have an on/off switch on this thing? Ridiculous! I suspect the only reason it actually finally turned off is that the battery went totally dead, used up by the LED's which remain continuously on. If I find out differently I will write a new review, but so far this is a big disappointment.