100-125 volts ac; 48-400 hertz; 5.67 in. W; 2.84 in. H; 6.38 in. Deep, extension behind front panel; 0.437 i n. Extension in front of panel; operating range ambient temp 0 degrees c to 50 degrees c, temp rise inside case 5 degrees c, ambient humidity m70 percent at 0 degrees c to 50 degrees c, storage temp m40 degrees c to p60 degrees c, display, 0.6 in. High led numerals; case material, die cast aluminum