Electro-Gard Surge Protector. Protect your 110-120 volt A.C. operated electric fencer from lightning damage. Also protect computers TV`s and other sensitive solid state equipment. Today`s delicate electronic equipment Does need this protection. Just plug Electro-Gard into any 110-120 volt A.C. outlet. Operational light indicates Electro-Gard is on the job. Limits high voltage spikes to 350 volts and can absorb up to 34watts of transient power.