- 3 Air Comfort Level Indicator: This digital thermometer features three clear icons indicating air conditions: WET, OK, and DRY. It effectively measures indoor humidity and temperature, allowing you to adjust your humidifier, dehumidifier, and humidistat for optimal living conditions. - High Accuracy and Fast Refresh: With a wide measuring range of -4.0℉ to 158.0℉ (-20℃ to 70.0℃) for temperature and 10% to 99% RH for humidity, this indoor thermometer delivers high accuracy of ±5% RH and ±1.8°F. Data updates every 10 seconds, providing real-time environmental changes. - Compact Size & Easy to Read: This small, lightweight hygrometer is portable and ideal for use in various settings: bedrooms, offices, greenhouses, or camera drying boxes. The large LCD display features bold numbers, ensuring easy reading of temperature and humidity levels. - Versatile Mounting Options: Our thermometer can be easily mounted in three ways: wall mount, magnetic attachment, or tabletop stand, allowing placement anywhere convenient. The °F/°C selector is located on the back. Requires 2 x AAA batteries (not included), with a lifespan of approximately 12 months. Battery installation is simple, as the slot is on the back behind a sliding magnet cover. Use this thermometer to maintain a comfortable and healthy environment in your home or workspace. Whether monitoring humidity for your plants, ensuring optimal conditions in your cellar, or keeping track of the climate in your office, this device provides reliable and accurate readings tailored to your needs.