The Victor® 2140 12-digit calculator is perfect for desktop use either at home or in the office. Features an extra large LCD angled display. Other functions include: PC touch keys, selectable decimal switch, rounding slide switch, mark up key, square root key, grand total key, percent key, 4-key independent memory, change sign key, backspace key, automatic power down, and hybrid power (solar/battery backup). Power Source(s): Battery; Solar; Display Notation: Punctuated; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.