Our phones have burned out from a nearby lightning strike so I bought this one so I hope the new set doesn't get fried by others. We've had a couple of big storms in our area since then and the phones are fine, but it's really impossible to tell whether or not this prevented the power surge, unless it's frying, which hasn't happened yet. I will say that I used a different (but similar) type of phone line surge protector many years ago and they did a good job of protecting our data lines. I often had to replace them because they burned out, but the equipment was still fine.
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