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.