The Kerbl 372123 Duo Power X 2500 is a versatile electric fence energizer designed for both mobile use and pastures with light to medium vegetation. This powerful unit operates on either 230V mains power or a 12V battery, offering maximum flexibility. It delivers a maximum discharge energy of 2.5 Joules and an impressive 10,500 Volts. Suitable for various animals including cattle, sheep, goats, horses, poultry, pigs, and deterring wild animals. The energizer comes complete with an integrated fence tester for convenient monitoring.