Measurable temperature range: -50-and70, temperature measurement accuracy: 1.0. Measurable humidity range: 10 percent -99 percent RH, humidity measurement accuracy - 5 percent RH (at room temperature 25). Battery-1xLR44 button cell. Mini circular temperature and humidity measuring instrument, suitable for various scenes. Humidity Temperature Monitor - This portable hygrometer thermometer measures indoor humidity and temperature, helping you know the indoor air conditions. Widely Used - The mini LCD digital thermo-hygrometer is very popular and is widely used in living room, greenhouse, musical instrument room, wine cellar, basement, warehouse, attic, baby room, cloakroom. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store