Have some ethernet cables out of doors that I wanted to protect from spikes and surges. These look like they have good specs for protection. Works fine on gigabit networks and power over ethernet ( i am using these on both). Had to laugh about the "thunder" protection however. Thunder is after all a sharp sound pressure wave which propagates through air and isn't going to hurt any of your electrical equipment but may have the effect of scaring kids and household critters.
Remember to ground these however. The best protection is to a nearby ground rod or buried water pipe. I see installations all the time where people buy lighting and surge suppressors but dont ground them or just luck out via other ground paths. Read up on the internet for how to use these properly.
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