The Kube 4000 110v plug-in energizer is economic and wide-impedance. Areas where wide-impedance units excel are: high resistance conductors (stainless steel polywire/hot tape/electrified netting); minimal ground rods; livestock or wildlife with dry skin or hair (poultry, deer, goats); and very dry soils. It will keep in cattle, sheep, goats, horses, poultry and guard dogs. Effective at protecting against coyotes, stray dogs, bear and fox. It also works to keep deer, raccoon and rabbits out of garden/orchard/vineyard and apiary areas Unit produces 2.3 released joules. 1.9 output joules in moist soils and 1.24 output joules in dry soils. Should power 3 miles of 3 strand cattle fence; 1 mile of 5-7 strand sheep fence; 15 rolls of 164' sheep/goat nets or 7 rolls of 164' PoultryNet. The Kube 4000 plug-in energizer is economic and wide-impedance. Wide-impedance units perform better over a wider range of fence conditions and conductors than standard low-impedance units. Areas where wide-impedance units excel are: high resistance conductors (stainless steel polywire/hot tape/electrified netting); minimal ground rods; livestock or wildlife with dry skin or hair (poultry, deer, goats); and very dry soils. A 110v electric fence energizer used for medium length fences. It will keep in cattle, sheep, goats, horses, poultry and guard dogs. Effective at protecting against coyotes, stray dogs, bear and fox. It also works to keep deer, raccoon and rabbits out of garden/orchard/vineyard and apiary areas. Unit produces 2.3 released joules. 1.9 output joules in moist soils and 1.24 output joules in dry soils. Requires 6 ft. of ground rod in the ground. Produces 48 pulses per minute and draws 4.5 watts per hour. Has a 6' cord with a 2 prong plug. Should power 3 miles of 3 strand cattle fence; 1 mile of 5-7 strand sheep fence; 15 rolls of 164' sheep/goat nets ; or 7 rolls of 164' PoultryNet.