DataShark Network Cable Tester - Cable Mapper, Check Continuity - Test Patch Cords or Installed Cable Runs

Invaluable tool and at a great price. An absolute necessity if you make your own cables and for testing same elsewhere.

Crimped a bunch of Ethernet cables and had a bad one. Easy to figure out. Plug and play.

Cannot use it without the batteries it said it includes.

Very helpful in the job and have a great value

Horrible product do not buy

Its simple and works really well. Tells you which lines are not terminated properly. Great product especially for the price.

Just what I needed!

Avoid this hunk of garbage. Spring for a name brand device with a screen that shows if its passes, has an open, etc. This shows nothing, it hard to understand and is cheaply made.

Seems to be a simple cable tester. I have not used it yet. But the product looks to be well made.

The DataShark RJ45 Network Tester (70025) is an incredibly simple but essential tool. You can quickly and easily test everything from short patch cables to long through-the-wall data runs. This tester continuously pulses each of the 8 wires in succession and successively illuminates each of the 8 LEDs one at a time on both the sender end and the remote units. If there is a bad connection, the LED will not illuminate on the remote unit identifying the bad wire. If there is a cross wiring problem, the LEDs on the remote unit will illuminate out of succession so you can tell which wires are crossed. This makes it very easy to identify and fix any wiring problems.