This is a source of conditioned 115 volts; 60 hertz power is required tosupply the computer, it's peripherals, and associated instrumentation; dimensions-height 21.250 inches, width 12.250 inches, depth 19.250 inches; electrical characteristics-has output of 8 kva/input of 240 volts/120/240 volt output/unit effiency is 97 percent/voltage regulation is +/- 4.5 percent of