Ambient Weather Thermo-Hygrometer / Transmitter Replacement, WS-1090 Weather Station, 915 MHz Ambient Weather WS-1090-THR Thermo-Hygrometer / Transmitter Replacement, WS-1090 Weather Station. Important Note: The operational frequency of this device is 915 MHz. Check the back of your display console to verify you own the 915 MHz console. Also supports some WeatherWise, Tycon Power ProWeatherStation, and Zephyr Instruments Weather Station. This is a replacement part only and does not include a display console. Do not order unless you already own the weather station.