The low impedance 20 Joule, 110V Master will handle pastures up to about 640 acres. The low impedance means it will maintain a controlling voltage even loaded with heavy vegetation. All Cyclops chargers have more lightning protection than any other chargers made.American made, two year warranty./>GROUNDING: REQUIRES AT LEAST 5 - 6' GROUND ROD CONNECTED TO FENCE. Ground rod must be driven in as deep as possible and spaced 10' apart.
