Keep your cigars in optimal condition with this compact mechanical hygrometer. The round design and luminous display make it easy to monitor humidity levels in any storage box. Its automatic sensing feature ensures accurate readings, providing peace of mind that your cigars are stored in the ideal environment. Features -Color:Golden -Material:Metal -Size:3.70X3.70X1.00cm/1.45X1.45X0.39in -Dial diameter: 37mm -Back diameter: 32mm -Thickness: 9.7mm -Measurement error: +/-5%RH (between 40~70%RH) -Practical no batteries required, providing automatic and reliable humidity sensing -Luminous design: small luminous feature ensures easy reading in dark environments, enhancing usability -Precise hygrometer: accurately monitors and maintains the ideal humidity for cigars -Dual-use: compatible with cigar humidors and guitar cases, versatile usage options -Portable and compact: lightweight and small, easy to carry and store, for travel and convenience Package list: 2 x cigar humidity meter