2 antennas accomodated; 1 receiver accomodated; impedance, 390000 ohms input impedance, not rated for output impedance; operating power rqmt, dc, 29v; 2.906 in. By 3.250 in. By 4.156 in. O/a dim; four 0.180 in. Diameter mtg holes on 2.000 in. By 2.750 in. Mtg centers; general purpose use