Whether in an office setting or at home, the EL2630PIII is the perfect 12-digit printing calculator for the occasional user. The extra-large display makes for easy viewing. Engineered with a Microban antimicrobial agent that reduces the growth of microbes and bacteria on the keys that cause discoloration and odors. You will always be able to count on the fast and reliable 4.8 lines-per-second ribbon printer. Other functions include: mark up key for calculating cost-sell-margin calculations, percent changes, automatic add-on/discounts calculations, automatic tax keys, clock/calendar function, conversion function, constants in multiplication and division, grand total key, change sign key, large-size add and subtract keys, fully selectable decimal settings, date/non-add key, item count, average key, selectable rounding switches and four key independent memory. AC power.