Features: Size: 44x44x22mm/1.73x1.73x0.86inches. Design: Made of metal, stylish, durable, anti-corrosion. High precision: The advanced humidity sensor maintains +/- 0.5% accuracy. Minimal maintenance: This hygrometer does not need to replace the battery. Service & Notice: If you have any questions, please feel free to contact with us, we will offer the best service. Enven though hygrometers have been calibrated before being sent, you had better do calibration before using in for case of inaccuracy. Package Includes: 1x Cigar Hygrometer Specifications: Material: Alloy+Acrylic Weight: 11g Size: 44x44x22mm/1.73x1.73x0.86inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Size: 44x44x22mm/1.73x1.73x0.86inches. Design: Made of metal, stylish, durable, anti-corrosion. High precision: The advanced humidity sensor maintains +/- 0.5% accuracy. Minimal maintenance: This hygrometer does not need to replace the battery. Service & Notice: If you have any questions, please feel free to contact with us, we will offer the best service. Enven though hygrometers have been calibrated before being sent, you had better do calibration before using in for case of inaccuracy.