Victor Ink roller print calculator features a 12-digit display for convenient viewing. Calculator is ideal for home, office, school use and provides easy on the spot answers. Power source: Battery. Display notation: Numeric, display type: LCD. Memory: 4 key. Display angle: Fixed. Display characters height: 19 mm. Dimensions: 9. 75" x 7. 75" x 2. 5". Replacement ribbon/roller: DPS-R1427. Replacement roll paper: UNV-35720. Ribbon/roller printer: Roller. Printing color: Black and red. Printing paper: 2 1/4". Printing speed: 2. 7 lines per second. Percent key, +/- switch key, backspace key, double zero key, grand total key. Decimal function, cost/sell/margin, item count function, percent add-on/discount, tax calculation, time/date. Antimicrobial product protection, manufactured with 45% recycled plastic, contemporary black and silver design, selectable decimal switch. Selectable rounding switch, PC touch keyboard, sigma. Weight: 1. 2 lbs. Warranty: 2 year. Uses replaceable Victor ink roller IR40T. Anti-microbial protection reduces the growth of microbes and bacteria on product, which can cause discoloration and odors on the exterior surface and keys.