handheld, Dual-powered 8-digit Calculator With Hard Cover Is Perfectly Sized For Pocket, Briefcase Or Purse. Functions Include Addition, Subtraction, Division, Multiplication, Percentages And Square Roots. Three-key Memory Includes Memory Plus, Minus And Recall/clear Memory Keys. Calculator Has A Flat Viewing Angle And Large, Eight-digit, Liquid Crystal Display (lcd) With Punctuation. Calculator Automatically Switches From Solar To Battery Power In Low Light.