The vast majority of surge protectors continue to provide power after a surge, the protection circuitry has failed (and they all eventually fail). This allows you to use a surge protector years after your devices' protection ends and never even realize you're not protected. The main reason I bought these is that when they can no longer protect, they fail completely, meaning they don't offer air conditioning. This is how all surge arresters should work, but only a few. Not only does this surge protector work flawlessly, it has some of the best surge protection performance in the industry, rivaling the performance of surge protectors that cost many times more than this little device.
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