"Product DescriptionSpecifications:Size and weight: front: 2in; 0.39in; back: 1.8inx0.39in;Humidity measurement accuracy: 22-55 (RH ).Accuracy: The humidity sensor maintains an accuracy of +/- 0.5%.Material: Aluminum outer ring, plastic lens, metal bottom case.Package Contents: 1 * Cigar Thermometer1.[Design]: The humidity gauge features a round disc shape, easy to install in different storage boxes, each is equipped with a rubber ring on the back, which can be directly embedded in the reserved hole of the cabinet, convenient for viewing the internal humidity of the cabinet.2.[Material]: The hygrometer is made of high-quality metal and glass, noble and Exquisite, compact and practical. The moisturizing box is made of PV and polymer moisturizing cotton, which absorbs water quickly and evenly and has strong water retention.3.[Cigar Hygrometer Features]: The cigar hygrometer can be applied to measure the humidity of cigars and effectively detect the state of cigars, providing favorable conditions for the mature fermentation of cigars, its humidity error is +/- 5%, accurate and sensitive gauge to use.4.[Durable to Use]: These mechanical round hygrometers are made of quality alloy material, durable and anti-corrosion, not easy to break, the pointer is very stable, so you can use them for a long time