Continuous tuning from 3 khz to 620 khz, selective bandwith of 250 hz or 2500 hz, flat vtvm response from 1 khz to 620 khz, bandwith 250 hz and 2500 hz controlled by crystal filters, temp range 0 to 50 degrees c, power requirements 115/230 vac, 50/60 hz, 60 watts, 17 in. W, 10.125 in. H, 14.250 in. Dp