2operating freq 400 hz, 0.0 to 70.0 degrees c operating temp range, 115v 400 hz at 850 ma and plus 25v at 850 ma and porm 10v at 5 ma power rqmt, 2 speed and 36 speed load synchros, less than 1 ohm source impedance, 6.000 in. H, 6.500 in. W, 6.500 in. Lg