Compact and Versatile: With a diameter of 1.8 inches and a thickness of 0.55 inches, this hygrometer is ideal for a variety of environments such as homes, offices, cars, and cellars. It can be easily mounted on a wall or integrated into containers such as water tanks, buckets, and glass jars, which increases its practicality and accessibility. Enhanced Functionality: It features an improved vent design for optimal airflow and an upgraded power switch for increased durability and convenience. This design ensures more accurate and reliable measurements, making it an essential tool for maintaining ideal environmental conditions. Precision Monitoring: The device is equipped with a new sensor with a humidity range of 20%RH to 99%RH with an accuracy of 5%RH and a temperature range of 14 to 140 with an accuracy of 1.8. Its high accuracy makes it suitable for sensitive environments such as greenhouses, laboratories, and reptile enclosures. Fast Response and Temperature Conversion: Measurements are updated every ten seconds to allow for timely adjustments. Easily switch between Fahrenheit and Celsius to suit your preference, ensuring you get the necessary information in the format you are most familiar with. Complete Package: Powered by one LR44 battery, each pack includes three hygrometers with batteries installed, three extra LR44 batteries and six pieces of double-sided tape for easy installation. This set provides everything you need to start monitoring your environment right away. Color: White Material: Plastic Package Contents: 3 * - Hygrometers are the above package contents only, other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowable error is +/- 1-3cm.