Description:This thermometer and hygrometer is a practical gadget for instrument lovers. It is compact and portable to place at the violin or guitar case, no battery needed, it shows the current humidity and temperature clearly. Greatly beneficial to the storage and care of your precious instrument.Features:Adopt alloy frame, with exquisite workmanship and delicate appearance.Round shape, compact and portable, it won't occupy too much space.Measure the humidity at the range of 20-100 percent .Measure the temperature at the range of -25-55 or -13-130, display at both and .Mainly used for the humidity and temperature measurement of musical instrument like violin and guitar.Specifications:Condition: 100 percent Brand NewMaterial: AlloyFit for: Violin, GuitarHumidity Range: 20-100 percent RHTemperature Range: -25-55 or -13-130Outer Diameter: approx. 4.3cm or 1.7inchWeight: approx. 26gPackage Included:1 x Thermometer HygrometerNote:1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.