Omnidirectional antenna, Folded Ground plane 1/4 Lambda. Technical data: Frequency 108-136 MHz, impedance 50 ohms, gain 2,15 dBi, Pmax 500 W, PL-fermale, material aluminium, brass, synthetic, level of 1185 mm, length the radial 650 mm, weight 570 gramme, mast mounting oversize mast 35-40 mm, optionally adaptors for side mast mounting 35-54 mm.