Parmak Multi-Power Mark 8 Electric Fencer, 110-120 Volt AC Operation, Low Impedance For Medium To Large Pastures, Single Or Multi-Wire High Tensile Fence, Advanced Solid State Circuitry Featuring Parmak's Exclusive Built-In Digital Performance Meter, Shocks Through Wet Weeds & Brush, Ideal For Livestock Or Predator Control, For Indoor Installation, Charges Up To 30 Miles Of Fence, UL Listed.