Alumimum, enamel finish, operating power 120 volts, 60 hertz, single phase, 23.416 in. Max o/a lg, 17.170 in. Max o/a w, 7.380 in. Max o/a h, 962 to 1213 mhz frequency range, 5 bands, 252 channels, porm 0.0015 pct accuracy of frequency calibration, 50 ohms input impedance, generator is crystal controlled, five crystals for any channel