The Gallagher 303307 M1200i is a high-performance electric fence energizer designed for large farms up to 48 hectares (120 acres). This intelligent i Series energizer delivers 12 Joules of stored energy and 8 Joules of output energy, making it suitable for controlling all types of animals. It features an external display for monitoring fence performance and allows remote control of the energizer. The M1200i is built with robust lightning protection and is compatible with the i Series Remote and Fault Finder, ensuring reliable and efficient fence management. It operates on 230V mains power and is recommended with 4 x 2-meter earth rods for optimal performance.