Sharp 12-digit calculator, el2630piii, 2 color printing, 8-1/4" x 11-1/3" x 2-1/5", white heavy-duty, two-color printing/display calculator features microban protection and a 17mm blue fluorescent display with 12 digits. Print 4.8 lines per second with positive numbers in black and negative numbers in red on standard-size paper rolls. Use markup key to perform markups, cost/sell/margin calculations, percent changes, and automatic add-on/discounts. Other functions include three-digit punctuation, clock, calendar/clock calculation, oversized add, subtract, multiply keys, grand total, four-key memory, built-in conversion and average functions, floating/fixed decimal (6, 3, 2, 1, 0 and add), add/constant mode, item count and round up/down selector. Calculator runs on ac power. functions grand total key +tax/-tax keys conversion average calculation adding mode constant cost/sell/margin double zero key round settings item counter mark-up key memory floating (f) or fixed decimal (6-3-2-1-0), add (a) and constant (k) modes three-digit punctuation clock calendar/clock calculation oversized add subtract multiply keys four-key memory percentage calculator features heavy duty clock calendar this product arrives to most customers in 3-7 business days.