Tired of digital hygrometers that don't fulfill their promise? You need a Cigar Oasis 4R hygrometer. Accurate to +/- 1% and recalibrate-able! Easy-to-read color coding; 3-day High/Low readings; secure magnet mount; battery included. Order yours now and never smoke a dry cigar again.
I have had this hydrometer working great now for over 9 months! I Calibrated it with a boveda kit took about 3-days to work minor adjustments .I Use 69% boveda packs in my humidor and this has been DEAD ACCURATE! I only have one drawback....the glue/ 2 side tape for the magnet falls off due to the humidity, every time I lift the lid I have found it on the cigars! But a couple spots of WATERPROOF superglue gel and it has not fallen off since!
Mine was accurate out of the box. Checked it with a Boveda 72 pack and zip-lok. Big size. Easy to read. Ability to calibrate if needed. I like the temperature feature as well. Looks good in the humidor too. I would recommend this product to others.