La Crosse Technology 308-1414B Wireless Atomic Digital Color Forecast Station with Alerts, Black Full color LCD with weather icons: sunny, partly sunny, cloudy, rainy, stormy, snowy Atomic self-setting accurate time & date with automatic daylight saving time resets.Outdoor humidity range: 19% to 97% RH. Indoor humidity range: 19% to 97% RH Monitors indoor & wireless outdoor temperature (f/c) & humidity (%RH) with recorded min/max values Temperature alerts (indoor/outdoor). Display: 5.0V AC adapter for primary power Reception & low battery indicators. Indoor humidity range: 19 percentage to 97 percentage RH. Temperatures below - 20F (-28.8C) require Lithium batteries in the outdoor sensor