Ground plane antenna 1/4 Lambda + 1/2 colinear, frequency 430-440 MHz, fm 433 MHz, impedance 50 ohms, connector N-female, gain 4,65 dBi, Pmax 150 W, material aluminium, anodises, stainless steel, chrome steel. Dimension 990x200 mm, weight 730 gr, inclusive side mast fixture for mast diameter 35-54 mm.