The Super Accurate Round Digital Hygrometer is 1.8″ in diameter and features a very durable, black plastic case. On the back of the hygrometer, you have a foam pad that has a piece of metal that attaches to the built-in magnet on the hygrometer so you can easily stick and mount this wherever you’d like – inside your humidor or on your wall. It also has a battery compartment that holds one coil cell – 357 A battery. The battery will last for a few years and can easily be replaced at any watch store.
By default, this hygrometer will feature the temperature in Celsius. If you push the red button at top, it will convert it to Fahrenheit and you can easily go back and forth. Not only does it show you the temperature but it does show you the humidity and what’s unique with this hygrometer is that it’s easy to calibrate. After you put it in a calibrating kit or zip top bag with some salt and you do the calibration test on it, if you find that it is off, you can easily turn this knob the number of clicks it’s off and press the reset button and that will lock in your humidity setting to make sure the level in your humidor is accurate.Product Demo: Super Accurate Round Digital Hygrometer by David Sabot