This multi purpose fence energizer can be plugged in, used with a 12v battery and/or solar panel. Powers up to 45 miles / 160 acres of clean fence and offers uncompromising performance. Features low impedance that will shock through weeds and brush. Clean Fence:45 miles /160 acres Typical Fence:14 miles /90 acres 2 Stored Joules (3-5-05455)