This 12 digit Calculator has a huge LCD screen that clearly displays big numbers makes it easy to read from afar and it s aesthetically pleasing. Your calculation process will be faster and smoother with this calculator s 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. This calculator utilizes both the solar power and battery power battery included. The solar panel is the primary source of power as long as you use it in a lit environment. This calculator is designed for many occasions: business office home basic budgeting school and more. Use it to assist your personal finance or for just a quick calculation session. Add subtract multiply divide backspace grand total CE M+/M/MRC On/AC Button and Auto PowerOff. The calculator will turn itself off after about 6 minutes of being idle.