Ideal for families with elderly members or children, the large font display eliminates squinting and provide instants environmental awareness for sensitive groups This double display digital indoor thermometers with backing features a high precisions sensors for realtime temperature / humidity ( ±1℃ accuracy) and instants readings, perfect for home climate controling Monitor nursery humidity for infants comfort, optimizes greenhouses conditions for plant, or maintain ideal environment using wall mountable or freestanding hygrometer Operates continuously with two AAAbatteries ( not included), feature 4°F to 158°F ( 20°C 70°C) temperature ranges and 10% 99% humidity detection for comprehensive environmental tracking Its large screen displays clear ℉ / ℃ readings and comfort reminder, while compacts design ensures space saving placement in any room