8 Joules - low impedance electric fence charger/energizer/fencer. Very high power output. Fence Load Detector. Lightning-resistant with built-in Heavy Duty Surge Suppressor. Operates from 12V/DC Battery current. Needs 3 - six to eight-foot ground rods.Check Manufacturer Mile Ratings and Power HereORDER HERE! Cyclops BRUTE Electric Fence Charger /Energizer. Our most popular selling energizer at 8 output joules of power.A low impedance, 8 Joule, Electric Fence Charger. The low impedance means it will maintain a controlling voltage even when loaded with heavy vegetation. Very high power output.All Cyclops Electric Fence Chargers have more lightning protection than any other chargers made.Built-in Fence Load Detector.Built-in lightning-resistant with built-in Heavy Duty Surge Suppressor.Operates on 12V/DC Battery current.Needs 3 - six to eight-foot ground rods.Proudly American Made.One year warranty. Extended Warranty is available www.taylorfence.net