Dual Power Design: The calculator is powered by solar energy or AA dry batteries. When the light is sufficient, the solar energy works, and when the light is too weak, it immediately switches to battery operation (to ensure the calculator works). The calculator can be switched to automatically shut down to save energy. (Battery not included in the package).Mini Portable Desktop Calculator: Simple design, high-quality and durable workmanship. Calculator for seniors, accountants, salespeople or other business people. 2 Pack Desktop Calculators. Note: Leave it in the sun for 2-3 hours before first use or use the battery.Responsive Buttons: Generous button sizes ensure that your fingers are less likely to hit the wrong number. The calculator buttons are made of easy-to-use and clean plastic material, comfortable to touch and responsive for calculations. Large buttons are easy to use and clean.Multi-function: Use it in all possible occasions, the calculator can speed up the processing of general mathematical calculations, calculator functions, addition, subtraction, multiplication, division, CE, M+/M-/MRC, ON/AC. Help you avoid calculation errors, reduce calculation errors and increase your work efficiency.Large screen display: The calculator can display 12 inclined numbers. The large LCD screen is located directly on the top of the calculator. It is very comfortable to use. The screen is clear and does not hurt the eyes. It is suitable for long-distance reading and night reading without harming the eyes. Too much pressure.