Large 12-Digit Display: The large LCD display that clearly displays large numbers makes it easy to read from a distance and is aesthetically pleasing. Maximum support 12-digit display. Dual-power design: The calculator uses both solar power and battery power (battery not included). As long as you use it in a well-lit environment, the solar panel will provide continuous power to the calculator. Sensitive and large buttons: when pressed, the buttons quickly register and display the corresponding number on the filter. The electronic desktop calculator adopts scientific large button design, conforming to human habits and comfortable to touch. Multi-function: add, subtract, multiply, divide, back down, grand total, CE, %, M+/ M-/MRC, ON/AC button and automatic shutdown. The desktop calculator will shut off after approximately 6 minutes of inactivity. Ideal for home & Office] This basic calculator is suitable for business, office, home, school or anyone who needs to do any type of calculation from time to time.