M30 energizer for permanent electric fence. Low impedance power. Features built-in lightning protection. Ideal for safely controlling domesticated livestock around your farm or acreage. Made to last with a tough outer casing with simple plug and play installation. Indicator light shows energizer is operating. Covers 10 to 20 acres, or 2 to 5 miles. 110 volts. UL (Underwriter's Laboratories) listed. 2-year warranty.