Color: Silver Type: Desktop Calculator Power Supply: 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 This Item Comfortable Computer Key Buttons: The special computer key button is higher than the regular computer and increases the button's resilience. It cannot be easily blocked when you use it. The large button can help the elderly see clearly and use it happily. Upgraded LCD Display: We use the specially modulated pigment for the display which greatly improves the clarity of the screen. Dual Energy Saving: The power supply is battery and solar (one AA battery is not included). The solar design allows the calculator to operate during the day or even in low light conditions without a battery. Special Functions: When you want to calculate a number, it will express the symbol (plus, minus, multiply, or divide) on the screen. It can help you see the working step when you are working continuously. Apply For: It is perfect for offices, businesses, schools, shops, shopping malls, and homes. It supports user input, such as bank documents, finance workers, receptionists, and data analysts, etc.