The Gallagher 323305 M350 is a robust 3.5 Joule electric fence energizer designed for permanent electric fencing systems, capable of powering up to 120 acres (48 hectares) or 22 miles (35 km) of multi-wire fence. This mains-powered energizer delivers 3.5 Joules of stored energy and 2.5 Joules of output energy, making it ideal for controlling various livestock, including cattle, sheep, and horses. It features built-in lightning protection and a durable, weather-resistant casing for reliable outdoor performance. The M350 is a genuine Gallagher part, ensuring compatibility and optimal performance with Gallagher fencing systems.