CERRXIAN Ethernet Surge Protector RJ45 Coupler Female to Female Network Surge Protector Outdoor Arrester Protection Device Extension Adapter(2-Pack)

I had tried 2 other lightning arresters. One switched the signal from 4 to 5. The other, did not switch any signals, but would not work in my setup. Perhaps I should explain my set up. I have a micro wave antenna which captures a signal from my ISP and converts it to an Ethernet signal. We live on a mountain in Tennessee which is often struck by lightning. Therefore, I really need lightning protection on any wired connection. From the ethernet signal from the antenna I connect with an ethernet 8 rj45 unmanned switch which supplies my EERO gateway and the fiberglass connection to my office. The other 2 arresters would not work. This one seems to pass the ethernet signal flawlessly.It is not connected to ground. All of the other 2 are connected to ground. Whether it will protect against lightning I do not know. When we have another storm with cloud to ground lightning I will report again. Amazon lets one add to reviews.

We had a lightning strike that took out all sorts of stuff, mostly internet stuff including stuff that was on surge/UPS protection. I now have an earth grounded surge protector on the twisted pair that comes in from AT&T. We assume that's how it got in and spread. These are in-line and don't require an earth ground so I put one on my generator (lost the logic board on this) and one on the line between my gateway and my switch.

Seem decent. No signal loss or degradation that I can find. I learned a tough lesson and didn't add these in-line until after a surge came through a CAT5 cable and took out my fios modem and brand new OLED TV. Hopefully if it happens again, this will save me a huge headache.

This being a surge protector, I hope I never have to find out its true effectiveness. Easy to connect, and small enough to take when traveling and using ethernet connections in hotels or conferences.Piece of mind and one less thing to worry about.

I bought these as my home is prone to near by lightning strikes. I have a large home wired network and use these on both ends of my long cable runs and before equipment connections. I hope they perform as excpected.

Worked great allowed me to connect 2 ethernet cables together.

Cheap quality

Beyond that cannot tell. Will have to wait for next lightning storm. Not definitive but if I find dead electronics and what I have on these survive its good. If dead just cannot say as lightning is unpredictable in its effects. Ditto for line surges, brownouts and plain old powerline noise.