CATIGA by Adesso CD-8185B CD-8185 8-Digit Home and Office Calculator, Dual Power (Black)

• 4-in. LCD screen clearly displays big numbers, making it easy to read from far away;• Responsive buttons: once pressed, the buttons quickly register and display the corresponding number on the screen; large size of the buttons prevents you from hitting the wrong button;• Utilizes both solar power and battery power (battery included); solar panel is the primary source of power, as long as you use it in a lit environment;• Designed for many occasions: business, office, home, basic budgeting, school, and more;• Auto power-off for the calculator to turn itself off after about 6 minutes of being idle;• Add, subtract, multiply, divide, backspace, grand total, CE, %, M+/M-/MRC, On/AC function keys help with basic and complex calculations;