This compact luminous cigar hygrometer is designed to automatically sense and display the humidity levels within your cigar storage box. Its mechanical construction ensures accurate readings, making it an essential accessory for maintaining the environment for your cigars. The sleek design fits seamlessly into any humidor or guitar case. 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) -Useful: automatically senses humidity levels without the need for batteries, making it convenient and practical -Luminous design: small luminous design allows for easy use in dark environments, ensuring you can always check humidity levels -Precise monitoring: hygrometer function accurately monitors cigar humidity, keeping your cigars in optimal condition -Versatile use: suitable for both cigar humidors and guitar cases, making it a versatile accessory for different needs -Portable and lightweight: lightweight and compact, easy to store when not in use, and convenient to carry around Package list: 10 x cigar humidity meter