This digital hygrometer is a simple and practical accessory to monitor the preservation of your precious cigars in your humidor. This digital hygrometer works with a lithium battery, which ensures a long battery life and avoids having to change the battery often (this type of battery is used in quartz watches), and it is equipped on its back with a lithium battery. An adhesive allows it to be fixed in your cigar cellar. The digital display shows the relative humidity in the form of a dial (the needle is positioned according to the effective rate) and the temperature as a number (in degrees Celsius or degrees Fahrenheit using Button to switch the display).