This Sharp scientific calculator is the perfect size to keep in your pocket, briefcase or purse. It features 131 functions, an independent memory, and a 10-digit, 1-line LCD. Display Characters x Lines 8+2 x 1 Formula Notation Algebraic 3-Key Memory Storage Memory 1 Variable Statistics One Levels of Parentheses 15 Base Number Calculations Complex Number Calculations Probability (Random Numbers) Battery Powered Size 3-1/8w x 5-11/16d Replacement Battery - DL2016B Portable calculator with LCD display. Protective hard case and operating battery included.