Color Silver Type Desktop Calculator Power Source Battery Powered, Solar Powered Material Plastic Item dimensions L x W x H 19.1 x 14.7 x 3 centimeters Display type LCD See more About of this item Comfortable computer key buttons: The special computer key button is higher than the common computer and increases the resilience of this button. It cannot be blocked easily while you are using it. The large size button can help the elderly to see clearly and use it happily Upgraded LCD Screen: We use the specially modulated pigment for the display screen which greatly improves the clarity of the screen. Dual Power Energy Saving: Powers are battery and solar (one AA battery is not included). The solar design allows the calculator to work during the day or even in dim light without a battery. Special functions: When you want to calculate the number, it will express the symbol (plus, subtract, multiply or divide) on the screen. It can help you see the working step when working continuously Apply for: It is perfect for office, business, school, store, mall and home. It supports typing per user, for example bank documents, finance worker, receptionist and data analyst etc.