Hygrometers are necessary in order to make sure your cigars are kept at the proper humidity. Hygrometers must be digital in order to give you a trusted accurate reading. Analog hygrometers should only be used for decorative purposes since they are very inaccurate. All digital hygrometers should be properly calibrated before use; this is why we also carry the Boveda Calibration Kit. If you’re willing to spend money on good premium cigars, shouldn’t you protect your investment with a nice calibrated digital hygrometer?