Feature: 1. HUMIDITY DETECTION: This hygrometer is used to measure the humidity of violin, guitar, and other musical instruments, providing a good storage environment for the instruments. 2. SOLID CONSTRUCTION: This violin humidity meter is made of excellent alloy material, which has high hardness, good wear resistance, scratch resistance, and long service life. 3. CONVENIENT USE: Simply place the round hygrometer in a violin storage bag or case to display the humidity at a certain moment, without the need for batteries or other tools. 4. COMPACT DESIGN: This guitar violin hygrometer has a small size and light weight, which is easy to carry and store, making it convenient for you to use anytime, anywhere. 5. MINIMALIST TYPE: This violin hygrometer features a pointer and dial design, which is simple and beautiful, making it perfect for professional violin players and enthusiasts. Specification: Item Type: Violin Hygrometer Material: Alloy Application: Measure humidity for violin, guitar and other instruments Diameter: Approx. 38mm / 1.5in Thickness: Approx. 9.4mm / 0.37in. Package List: 1 x Violin Hygrometer