- Accurate and fast refresh: Temperature range -50C to 70C (display LL.LC below -50C; display HH.HC above 70C), Humidity range 10% to 99% (display LL% below 10%; display HH% above 99%). Temperature accuracy ±1C. Humidity accuracy ±3–5%. Suitable for home indoor, bedroom, baby room, kitchen, greenhouse, guitar room, office and wine cellar. - Large LCD display and easy readability: Large numbers on the hygrometer screen let you read data from a distance. If placement or environmental factors affect accuracy, you can calibrate the sensor for the most accurate humidity and temperature data. - Practical clock and calendar function: Monitors indoor temperature and humidity and also functions as a clock and calendar with 12Hr/24Hr switch and DD/MM European date format. Note: no backlight and no alarm function. - Colorful air comfort indicator: Comfort level indicator with a movable arrow points to color icons according to humidity. Helps you adjust humidifier, dehumidifier, or humidistat to prevent colds, dry skin, asthma, allergies, and mold. - Practical use scenarios: - In a baby room to maintain a healthy, comfortable environment. - In a wine cellar or greenhouse to safeguard stored items and plants. - In a guitar room or home office to protect instruments and equipment from humidity swings.