Very good device indeed, it checks the correct wiring of an RJ45 cable in terms of its pairs. It also checks RJ11 telephone cable

Simple, cheap ethernet cable tester. It does the job, it's small for the bag, and I hope it lasts.

It does its job OK, but without sound notification.
I tried it on a telephone installation.
It consists of two parts, a transmitter and a receiver.
It shows the continuity of the cables and diagnoses for short circuit or interruption when they exist.
I also tried it on an Ethernet cable.
If you want to check a telephone or Ethernet socket, you need to use a small auxiliary cable piece with connectors.

Everything is good and value for money. If it had sound to notify us of a circuit interruption, it would be perfect, but it doesn't bother me. We have eyes and can see the lights.
Update: After 2 years, one of the bulbs burned out.

It is very good, it does what it says, I have bought an adapter for all types of cables and it works perfectly. I got it to test Ethernet cables (I take online classes and always test the cables) but in the end I test everything.

Very good and economical. I believe that this has the right price and not three or four times higher.
I have changed its lights, it doesn't understand anything, it has saved me.

Flawless for its price. Quality construction like all products of the company. The only thing it lacks is audio feedback in cable testing.

Excellent value for money. I bought it for my work and so far it has proven to be reliable. I created a SOHO cabinet at home and tested all the network cables from the patch panel to the outlet to ensure that everything is connected correctly. Flawless. Note that for network outlets, you need to have a 0.5 or 1 meter UTP cable with you in order to connect it.

Also, when you use the tester on the ends of the cables, you should know that it shows which side is not connected correctly. For example, if I connect one end to the patch panel and the other end to the outlet where the cable goes, the panel shows it's okay but the outlet shows that wire 7 is not connected. The package also includes a BNC adapter.

I received it about a week ago and for the money it does what it promises and more!!! Very nice in terms of construction (always speaking in terms of value for money) and it performed great in tests on factory cables!!! In the near future, I will test it on S/FTP cat7 cables to see if the G (grounding) works correctly!!! Affordable and essential for electricians and those dealing with electronics

1 star because no matter how you place it, this annoying button gets pressed and drains your battery inside your bag. So, you should know not to put it in tight pockets because the button gets pressed and it turns on inside your toolbox. Now, as a tool, it does its job decently. But it definitely doesn't deserve 5 stars for practicality reasons, and the two stars are too much.