The Kerbl AKO Duo Power X 4000 is a versatile 12/230V electric fence energizer, suitable for both battery and mains operation. Designed for robust fence systems, it delivers strong output for various animal types, including horses, cattle, sheep, goats, and wild animals. This reliable energizer features deep discharge protection for 12V batteries, a micro-controller for constant voltage, and LED indicators for fence and battery status. Its weather-resistant housing ensures durability for outdoor use. With a charging energy of 5.5 Joules and a discharge energy of 4.0 Joules, it can power fences up to 40 km without vegetation.