Product Description Specifications 20cm ruler with built-in softkey calculator. Metric system in centimeters/inches. Button cell batteries included with protective film. Presented in an individual silver box Materials: Plastic Features: 20cm ruler with built-in softkey calculator Metric system in centimeters/inches Button cell batteries included with protective film Presented in an individual silver box Decoration Position: right Print Size: 5.5 x 2.2 cm