10-digit printing calculator features antimicrobial protection to reduce growth of microbes and bacteria that can cause discoloration and odors. Prints 2.7 lines per second in two colors. Calculator features well-spaced keys with PC Touch Keyboard, ink-roller printing, a liquid crystal display (LCD), constants in multiplication and division, percentage add-on and discount, change sign key, large add and subtract keys, nonprint or print mode, and cost/sell/margin function. Prints current time or date. Includes tax +/- keys, delta percent-percent of change, grand total, sigma function, backspace, item count and four-key independent memory. Calculator runs on AC/DC. AC adapter is included. Calculator uses four AA batteries (sold separately).