Fi-Shock EAC100M-FS AC Low Impedance Energizer, 100-Mile 100 mile range Heavy, wet weed conditions 115 volt, 60 cycle; pulsed output (1-second intervals); 10.9 stored joules of power; 6 joule output at 75 ohms Indicator light showing fence controller is working Output voltage no load is 12,400 volts