Round Digital Hygrometer with Adjustment Feature - Never wonder if your digital hygrometer is accurate. The HygroSet II is the first digital hygrometer of its kind capable of being adjusted after calibration. Each click of the adjustment knob changes the humidity display (+ / -) by 1-percent.
Button cell battery included.
Note: Quality Importers HygroSet II Round Digital Hygrometer is not compatible with exterior mount humidor models.