Product specs:

All surge protectors are designed to block over-current from damaging associated equipment. The key with any surge device is to prevent these damaging spikes while allowing the antenna signal through without causing signal drops or loss of channels. Ideally, surge protection devices exhibit no more than .5 decibel loss, making it less visible to the antenna signal than a conventional splitter, which typically exhibits 3.5 decibels of loss. 

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