Parmak, Electro-Gard Lightning/Surge Protector, Protect Your 110-120V A.C., Operated Electric Fencer From Lightning & Power Surge Damage, Protect Computers, TV's & Other Sensitive Solid State Equipment, Today's Delicate Electronic Equipment Does Need This Protection, Just Plug Into Any 110-120V A.C. Outlet, Operational Light Indicates Is On The Job, Limits High Voltage Spikes To 350V & Can Absorb Up To 34W Of Transient Power.