Sirio Antenna Sirio SD 1300 N 25 Mhz- 1.3 Ghz Discone Wide Band Antenna Base station antenna, omnidirectional unity-gain extremely wide-band suitable for scanner High quality discone antenna works on 25-1300mhz, N connector Polarization: linear vertical Gain: 0 dBd - 2.15 dBi @ lowest frequency Max Materials: Stainless Steel, Chromed Brass, Nylon Wind load / resistance: 66 N @ 150 Km/h / 130 Km/h Wind surface: 0.04 m Cone radial length (approx.): 810 mm mounting mast:  25-54 mm