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 HygrometerMaterial: AlloyApplication: Measure humidity for violin, guitar and other instrumentsDiameter: Approx. 38mm or 1.5inThickness: Approx. 9.4mm or 0.37in.Package List:1 x Violin Hygrometer