KLEIN TOOLS VDV501-851 Cable Tester Kit with Scout Pro 3 for Ethernet / Data, Coax / Video and Phone Cables, 5 Locator Remotes

The Klein VSVD501-851 proved to be an invaluable tool in diagnosing a tricky network issue. I had wired a Cat6A keystone plug, but instead of the expected 1G fiber internet speed, I was only getting around 60 Mbps. This tool quickly identified the problem—two loose wires in the keystone. Thanks to its precise fault detection, I was able to redo the connection and instantly restored full 1Gbps speed, both up and down.Beyond its accuracy, the device is intuitive and efficient, making it a must-have for network setup and troubleshooting. One thing I’d recommend is getting a case to keep the tool and accessories organized and protected. Having a dedicated storage solution ensures everything stays secure and ready when you need it, especially for professional or frequent use.

Well-built and easy to use. Has already helped me identify dodgy patch cables. Next project is to identify coax cables from old cable install to repurpose for POE for outdoor IP POE cameras. Arrived in great condition. The packaging is made of particularly tough plastic so you will need utility scissors to actually get it out of the packaging.

They say a craftsman is only as good as his tools, and when it comes to testing Ethernet cables, that couldn’t be more true. I’ve been in the game long enough to use everything from the dirt-cheap testers that barely do the job to the ultra-premium Fluke models that cost as much as a small car. The Klein Ethernet Tester Pro? It hits that sweet spot of reliability, affordability, and functionality.Unlike those budget testers that just scream “miswire” without telling you why, the Klein actually gives you useful data. It’s sensitive enough for PoE applications, which is a huge plus when working with powered devices. The build quality is solid—this thing can handle job-site abuse without falling apart. I’ve used it for multiple installations, and it has saved me time and frustration, not to mention unnecessary callbacks from clients.If you’re testing Ethernet drops more than just a couple of times a year, do yourself a favor and invest in this. It’s accurate, quick, and easy to use. Your clients will thank you (or at least, they won’t call you back complaining that their connection is dead).Now, is it a Fluke? No. But unless you’re doing hardcore daily network testing, you don’t need to drop that kind of cash. For the price, Klein absolutely delivers.

I bought this to do QA on the Cat6 Ethernet cables I ran under my house, and it worked very well for that. I had very few problems, but when I did, this tester let me know early on and saved me headaches later. I'm glad I bought it.

This tester kit is a huge time saver. It quickly identified my Ethernet and coax runs with zero confusion. The remote locators are clearly labeled and super handy for larger jobs. Solid build quality, easy to read screen, and intuitive controls. Great for pros or DIYers.

Every electrician needs this in their tool bag 10/10 Klein never disappoints

The instructions go into depth, but if you read them this tool is excellent. Excellent purchase and worth the money.

Excellent tester. I would buy again