110-volt energizer with 3.2 stored joules of power. Will charge up to 120 acres of multi-strand fence material with reliable, low-impedance power. It is equipped with power surge and radio interference protection. 9,000 volts open line. 4,900 volts @ 500 ohms. Large easy to see pulsing power indicator Tough, impact resistant, ABS plastic case Large, easy grip, power terminal knobs 3 yr. warranty includes protection from remote indirect, lightning strikes.