Parmak, Super Energizer 5, 50 Mile Range, Fence Controller, 110-120 Volt AC Operation, Low Impedance, Designed Specifically For Large Pastures, Single Or Multi-Wire High Tensile Fences, Advanced Solid State Circuitry Featuring Parmak's Exclusive Built-In Digital Performance Meter, Shocks Through Wet Weeds & Brush, Ideal For Controlled Grazing Of Livestock Including Sheep & Predator Control, For Indoor Installation, Charges Over 50 Miles Of Fence, UL Listed.