Feature: The outer casing is made of aluminum alloy, compact size, strong and durable Mechanical thermometer and hygrometer, no battery required With and fine and clear dial scale, easy to read Indoor and outdoor mini round aluminum alloy hygrometer thermometer Suitable for houses, offices, workshops, schools, shopping malls, warehouses etc. Specification: Type: Mini Thermometer Hygrometer Color: Gold + White Size: Approx. 58*12.5mm (Dia.*H) Temperature measurement range: -30~50degree Celsius (-20~120°F) Accuracy: +/-2degree Celsius Humidity measurement range: 10~100%rh Accuracy: +/-5%rh (40~70% rh) Note: Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Please allow 1-3mm slight deviation due to manual measurement. Thank you! Package Included: 1 * Hygrometer Thermometer