I have installed dozens of them and had NO problems. They are easy to install and work as intended. We get quite a lot of lightning strikes in Myrtle Beach, South Carolina and these devices have protected every home they have installed. Homes without them, in the neighborhood, quite often suffer thousands of dollars in damage from lightning or even power surges (not often). There are other brands out there and I've used a few of them before, but overall and for the price you couldn't beat this unit. In the personal test, he emerges as the winner.
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