I know the best kind are the ones which would be wired into the system, but saw this today and wondered if it would be any good. Is this a "better than nothing" or "you get what you pay for" situation...
So if a 3000 Joule spike hit my 1080 Joule rated protector; 1. Would it ruin my protector? 2. Would I see any signs that told me if my protector was no long providing its 1080 Joule rated protection?
Like I said, it is handy for checking polarity, I would like to think that in addition it is providing some level of protection. If there is no way to tell, then it is little more than a feel good device.