Impedance 100 ohms, dc resistance 3.5 ohms max, attenuation 0.25 db max, distortion porm 0.1 max, current 40 ma max continuous, dc working voltage 25 vdc, operating temp range minus 55 degrees c to plus 125 degrees c, 1.000 in. Lg, 0.785 in. W, 0.460 in. H