Protect Valuable Electronic Devices From Damaging Power Spikes.The iConcepts Surge Protector is designed to protect valuable electronic devices from damaging power spikes and interference found in all electrical power sources. When this occurs, the power strip dissipates the in comming and outgoing voltage to a level that will not damage your equipment. This Surge Protector has a light which indicates if the surge protector is protecting your equipment. If the light is not on, then the Surge Protector is no longer capable of absorbing spikes and should be replaced.