Specification: Item Type: Temperature Hygrometer. Material: Aluminum Case Product Dimensions: Approx. 5.7 x 5.7 x 1.2cm / 2.2 x 2.2 x 0.5inch Measurable: Temperature and Humidity Green < p>Applications: Greenhouses, warehouses, homes and offices without inserting the batteries Weight: Approx. 20g / 0.6oz Easy to Read: Thin transparent dial, easy-to-read scale display. The large screen makes it easy to read even from a distance. By recording temperature and humidity, you stay informed of the indoor humidity. No Batteries Required: The hygrometer lasts longer without batteries. The wireless thermometer hygrometer supports all basic functions. Our hygrometers are reliable and easy to use in homes, greenhouses and more. Two measurements: Measure temperature and humidity twice, pay attention to your four seasons and be your housekeeper. Ideal for measuring fluctuating readings, such as in greenhouses; Data measurements are updated every 10 seconds to inform you of the latest environmental