Usage Tips:Measurable humidity range: 20 percent -90 percent , humidity measurement accuracy: ±5 percent (at room temperature 25℃). Reliability, measured once every 10 seconds, provides the latest and accurate reading. Measurable temperature range: -50℃-and70℃, temperature measurement accuracy: ±1.0℃. You can see the current room climate and adjust the temperature and humidity of the room as needed with a humidifier. Home Humidity Temperature Monitor: This portable thermometer hygrometer measures indoor humidity and temperature, helps you know the indoor air conditions. Battery: LR44 button batteries, size: 44 x 44 x 15 mm. The small and portable temperature and humidity meter is suitable for any scene. Thlevel Digital humidity meter thermo-hygrometer is very popular and is commonly used in living room, greenhouse, musical instrument room, wine cellar, basement, warehouse, grain storage, baby room, wardrobe. 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.