Solid-state integrated circuitry with heavy-duty capacitors, built-in overload protection and auto reset Steel cabinet with lighted on/off switch and 6-ft. power cord. Anti-skid rubber feet. Heavy-duty screw terminal output. Converts 115 volts AC to 13.8 volts DC no load and 12.8 volts DC full load. DC ripple is less than 250 millivolts. Short circuit and thermal protected. Options: 2.5-, two 5- (one with lighter plug receptacle and screw terminals), two 10- (one with lighter plug receptacle and screw terminals), 18-amp converters.