Wireless Weather Station, Series AcuRite, Power Source (2) AA Alkaline (Rain Gauge), Display Screen Type Color LCD, Data Update Frequency 18 sec (Sensor), 60 sec (Indoor), 60 sec (Rain Gauge), Weather Sensor Type Humidity, Lightning Detector, Temperature, Transmission Range 30 m, Number of Pieces 3 The AcuRite Rain Gauge Weather Station with Lightning Detector monitors the weather, measures rainfall, and delivers early warning of lightning-producing storms. Highlights include an illuminated color weather station display that shows all the vital rainfall, temperature, humidity, barometric pressure, and lightning detection information you need. Perfect for property maintenance, construction jobsites, agriculture, or park districts and schools. This weather station also provides reliable, location-specific weather forecasts, as well as the time and date for convenience.