Parmak Model Mark 8 - 110-120 volt - AC Operated. The all new Mark 8 low impedance fencer gives you the stock holding power that you have always wanted. Shocks right through wet weeds or brush and over extremely dry ground. Features Parmak`s exclusive built-in DIGITAL performance meter that tells you the exact condition of the fence. Takes the guesswork out of electric fencing. 100% solid state with all new low impedance uni-junction circuitry. No moving parts. Ideal for use with high tensile single or multi-wire fences. New color coded fence and ground terminals. Red to the fence and Black to ground. The Mark 8 operates for less than 7 cents a month at 7 cents per kwh. Fuse protection with new built-in lightning arresters. Full 3 year warranty covers damage caused by lightning. Charges up to 30 miles of fence 4.9 plus joules.