You can now easily monitor the temperature and humidity of your 3D filament with the Bluetooth Hygrometer. You can even download an app so you can monitor it up to 40m distance from your phone. The CR2477 battery, that is included, will last up to 365 days. The internal memory will store statistical data up to 100 days. Want to find out more about this Hygrometer and the available app? Then click on the button below.