Classic color hygrometer is compact and easy to carry, suitable for different hygrometers. High precision: our analog hygrometer can be used to measure humidity and effectively detect the state of cigars, providing favorable conditions for mature fermentation. Its humidity error is + / - 5%. Accurate and sensitive for instruments are available for you. Durability: these mechanical round hygrometers are made of high-quality alloy materials, which are durable, not easy to break, and the pointer is very stable, which can be used for a long time Features: the hygrometer is disc-shaped, which is easy to install in different storage boxes. There is a rubber ring on the back of each storage box, which can be directly embedded into the reserved hole of the cabinet to check the humidity inside the cabinet. Mechanical movement: our circular analog hygrometer contains a mechanical movement without battery, so there is no need to replace the battery, which is very convenient to use. Specification: Color: gold, sliver Material: Alloy + acrylic Size:Approx.5x5x1.5 cm/1.96x1.96x0.98 inches Packing list: 1 piece hygrometer Package Includes: 1 Piece Hygrometer