12 Volt, Battery-Operated Low Impedance Fence Charger, Solid State Circuitry, Equipped With Performance Meter That Shows Condition Of Fence, For Livestock Or Predator Control, Medium To Large Pastures, Shocks Through Wet Weeds & Brush, Weatherproof, Portable, Outdoor Model, Use With 12 Volt Storage Battery, Charges Up To 30 Miles, Includes Battery Clamps, UL Listed.