The internal thermometer has a relative humidity of ± 2 ~ 3% and ± 1 ° F, which is very suitable for measuring fluctuating measurements such as greenhouses. The data measurement values ​​are updated every 10 seconds to provide you with the latest environmental changes. The hygrometer has a humidity level icon to display the air conditioner dry / comfortable / humid, allowing this humidity sensor to ensure that you are always aware of changes in your home / home at a glance. Accurate digital hygrometer thermometer displays temperature and humidity, ready to adapt to environmental changes at any time. Thermo-hygrometer with temperature and humidity monitor can guarantee good indoor humidity control for skin, allergens and others health benefits; it can also be used as a refrigerator thermometer, refrigerator thermometer, reptile thermometer, ground thermometer, hygrometer, cigar hygrometer, etc. The indoor thermometer is equipped with a desk stand, and the temperature monitor can be placed on the counter or connected to the refrigerator with a magnetic back. Description: Dimensions: 8.5 x 6.5 x 2 cm. Material: ABS. Power mode: 2 AAA batteries (not included). Humidity measurement range: -4% ~ 158 (RH). Temperature measurement range: -20 ~ 70 ℃. Contents: 1 digital hygrometer. Note: this does not include other things, the color is based on the first picture and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!