[LARGE DISPLAY] - The huge LCD screen that clearly displays big numbers makes it easy to read from afar, and its aesthetically pleasing. [SENSITIVE AND BIG BUTTONS] - Your calculation process will be faster and smoother with this calculators responsive buttons. Once pressed, the buttons quickly register and display the corresponding number on the screen. The big size of the buttons prevents you from hitting the wrong button. [DUAL POWER DESIGN] - This calculator utilizes both the solar power and battery power (battery included). The solar panel, as long as you use it in a lit environment, will power up the calculator thoroughly. [VERSATILE PURPOSES] -This calculator is designed for many occasions: business, office, home, basic budgeting, school, and more. Use it to assist your personal finance or just a quick calculation session. [FUNCTIONALITIES] - Add, subtract, multiply, divide, backspace, grand total, CE, %, M+/M-/MRC, On/AC Button, and Auto Power-Off. The calculator will turn itself off after about 6 minutes of being idle.