[Large 12-digit Display] Features a huge LCD screen with clearly displayed, large numbers for easy reading from a distance. Supports up to 12 digits. [Dual Power Design] This calculator uses both solar and battery power (battery included). In well-lit environments, the solar panel provides continuous power. [Sensitive and Big Buttons] Buttons quickly register and display numbers on the screen when pressed. The scientific large button design conforms to human habits and is comfortable to touch. [Multi-Function] Includes add, subtract, multiply, divide, backspace, grand total, CE, %, M+/M-/MRC, ON/AC button, and auto power-off. The calculator automatically turns off after approximately 6 minutes of inactivity. [Best for Home & Office] This basic calculator is perfect for business, office, home, school, or anyone who needs to perform calculations from time to time.