Wirelessly receives outdoor temperature (updates every 4 seconds) and monitors indoor temperature locally. The wireless range is an extended distance of 330 ft. Indoor temperature range 14 to 100 degF. Outdoor range -40 to 140 degF. Min/max range displayed for both indoor and outdoor readings.
Plus 3 weather forecasting icons indicate possible future weather tendency using changes in air pressure (sunny, cloudy with sunny intervals, or rainy). 12/24 Hour clock is standard. Five AA batteries needed (not included). Full instructions for setup and for external temperature sensor. Wall hanging or free-standing installation.