

🔧 Test smarter, not harder—your pocket-sized network guardian.
The Klein Tools VDV526-100 Network LAN Cable Tester is a compact, professional-grade device designed for quick and reliable testing of RJ11, RJ12, and RJ45 terminated voice and data cables. Supporting CAT3 through CAT6/6A cables, it features fast LED indicators for clear diagnostics of wiring faults, a secure remote storage system, and an auto power-off function to conserve battery life. Built with Klein’s 160+ years of craftsmanship, this tester combines durability, portability, and ease of use, making it an essential tool for network professionals and DIY enthusiasts alike.












| Brand | KLEIN TOOLS |
| Item Weight | 4 Ounces |
| Item dimensions L x W x H | 5 x 2.5 x 1.25 inches |
| Min. Operating Voltage | 9 Volts (DC) |
| Power Source | Battery Powered |
| Style | Tester |
N**Y
Excellent network cable tester
The Klein Tools VDV526-100 Network LAN Cable Tester has been a game-changer for my home networking setup. Whether you’re a professional or just working on DIY projects, this tester is a must-have for anyone dealing with Ethernet cables. The build quality is top-notch, as you would expect from Klein Tools—sturdy, durable, and designed to last. Using the tester is incredibly straightforward. It quickly identifies open circuits, miswires, and short circuits, saving me tons of time diagnosing issues with my Ethernet cables. The results are clear and easy to read on the LED indicators, and the auto power-off feature is a nice touch for saving battery life. I was able to test multiple Cat5e and Cat6 cables without any trouble, and it accurately verified the connections each time. The compact size also makes it easy to carry around, which is perfect for on-the-go testing. Overall, the Klein Tools VDV526-100 is reliable, efficient, and extremely user-friendly. It’s an excellent tool for both network professionals and home users. I highly recommend it for anyone needing a dependable cable tester!
B**N
Great little tool for the price...
This is a great little tool that has helped me to get my house wiring completed. It's not the most intricate but for the price it is a great little tool.
M**E
Reliable, Easy-to-Use Cable Tester — A Must-Have for Field Work
I first saw this Klein Tools VDV526-100 being used at jobs by other techs, and they all spoke highly of it — so I decided to get one for myself. After using it on several installs and troubleshooting runs, I can say I’m very happy with the purchase. This tester is a great option for checking network and LAN cables. It’s simple to operate but still powerful enough to catch shorts, mis-wires, splits, and continuity issues that cheaper testers often miss. One of the biggest advantages is that it comes with a remote unit, so you can test cables over long distances — even when the ends are in different rooms or buildings — without guessing or running extra trips. I’ve used it on CAT5, CAT6, and other common runs, and it consistently gives clear, accurate results. If you do network installs, maintenance, or troubleshooting, this is a tool you’ll find yourself reaching for again and again. Klein Tools didn’t disappoint — solid build quality and dependable performance. Highly recommended for pros and DIYers alike.
1**8
Simple is good but maybe too simple
I like a good fixed function simple tool that doesn't overcomplicate things. This tool is pretty good, but it basically just gives you pass/fail , it doesn't tell you anything about what is wrong. Perhaps the worst example of this is if you mix T568A and T568B it just tells you "miswire" , the same generic failure as all other miswirings. Some other ethernet testers will tell you cross over or even tell you exactly which wires are not correct.
W**T
Works Great!
works GREAT!! Help me find and fix several bad crimps.
L**A
Good value
Good value
T**R
Quality brand cable tester.
Great easy to use cable tester. Solid brand. Easy to use. Tests the cables to ensure their functional.
J**M
Comprehensive, Durable and Easy to Use - Klein Tools VDV526-100 Network LAN Cable Tester
The Klein Tools VDV526-100 Network LAN Cable Tester is an essential tool for any networking job. It is comprehensive, allowing users to test up to 10 different types of cables, including telephone and coaxial cables. It is also durable, featuring a rubber overmold that provides extra protection for it during hard use. In addition, the VDV Tester is very easy to use. It has an intuitive interface that allows users to quickly identify and troubleshoot faulty cables. The included LAN Explorer with Remote feature also makes it easy to test and diagnose network problems. Overall, the Klein Tools VDV526-100 Network LAN Cable Tester is a great tool for professionals and DIYers alike. It is reliable, robust and easy to use. With its comprehensive cable testing capabilities and the included LAN Explorer with Remote, it is a must-have for any network technician. Highly recommended.
Trustpilot
3 weeks ago
3 weeks ago