The mini thermometer hygrometer is derived from metal material, and not easy to fade, serving for a long time. Guitar humidity meter with unique design, resists corrosion, easy to install and use. A good humidity meter for guitar. Features -Color:Assorted Color -Material:Metal -Size:4.10X4.10X2.00cm/1.61X1.61X0.79in - Guitar humidity meter is made of reliable metal material, which is wear-resistant and has excellent durability - With a precise indicating needle humidiometer, reduce potential problems, such as warping, shrinking. - Have a nice appearance with the simple but elegant design, guitar humidity meter offers aesthetic satisfaction. - With this guitar hygrometer, can reduce the potential problems of guitar, like cracking and prevents guitar damage. - Small in size and light in weight, convenient to carry and use at any time, very convenient and practical. Package list: 2 x Hygrometers