Welcome to the store! [Large 12-Digit Display] The massive LCD screen that clearly shows large numbers makes it easy to read from a distance, and it's aesthetically appealing. Supports up to 12-digit display. [Dual Power Supply] The calculator uses both solar energy and battery (battery included). As long as you use it in a well-lit environment, the solar panel will provide continuous power to the calculator. [Sensory and Large Buttons] When pressed, the buttons register quickly and display corresponding numbers on the screen. The desktop calculator has a scientific design with large buttons that align with human habits and are comfortable to use. [Multifunction] Add, subtract, multiply, divide, backspace, total, CE, %, M+/M-/MRC, ON/AC buttons, and automatic shut-off. The calculator turns off automatically after about 6 minutes of inactivity. [Best for Home & Office] This basic calculator is ideal for businesses, offices, home, school, or anyone who needs to perform occasional calculations. Your satisfaction is our highest priority. We will provide you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!