PW12000 electric fence energizer from Power Wizard. Plug-in, ultra low impedance energizer controls 1-1,200 acres or 1-200 miles of fence wire and shocks through wet vegetation. Recommended for horses, cattle, pigs, sheep, deer, exotics and wildlife. 110 V; 12 joule output. Feature high performance digital technology, rugged all-weather construction, internal lightning shield, big easy-grip knobs and heavy-duty, long life construction. Plus, easy to service. 3 year warranty.Only Power Wizard energizers feature state-of-the-art ultra low impedance technology to increase energy output to maintain consistent shock power on fence lines which have deteriorated or become heavily weeded. Feature high performance digital technology, rugged all-weather construction, internal lightning shield, big easy-grip knobs and heavy-duty, long life construction. Plus, easy to service. 3 year warranty.