Description Large 12-digit Display The huge large LCD screen that clearly displays big numbers makes it easy to read from afar, and its aesthetically pleasing. Max support 12 digits display. Dual power Design The calculator utilizes both the 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 Big Buttons Once pressed, the buttons quickly register and display the corresponding number on the screen. The electronic desk calculator adopts a scientific large button design, which conforms to human habits and is comfortable to touch. Mulit-Function Add, subtract, multiply, divide, backspace, grand total, CE, %, M+/M-/MRC, ON/AC button, and auto Powr-Off. The desktop calculator will turn itself off after about 6 minutes of being idle. Best for Home Office This basic calculator suitable for business, office, home, school or anybody that needs make any sort of calculation from time to time.