The 900 MHZ Antenna Omni 1/4 Wave is a WeatherHawk base station antenna – with a dipole antenna has a range of up to 1/2 mile LOS (line-of-sight). The 900 MHz dipole antenna is compatible with WeatherHawk Signature Series 916/922 wireless weather station models and WeatherHawk 600 Series 620/621 wireless weather station models.