The Forcefield M10 mains fencer will produce 0.2 joules over 1.5 km of fence line which will cover up to 4 acres (1.6 ha). When using this fencer you will need to install a 1m earth bar. This fencer is easily installed and has easy to attach positive and negative nodes. This fencer comes with a 3 year warranty. It is compact and inexpensive. The M10 is suitable as a permanent or temporary fencer. This fencer will support multiple strand of fence wire or tape over the recommended distance.