Monroe ULTIMATE Desktop 12 Digits Print/Display Calculator, IKT, Black Large Green Fluorescent 12 digits display. 12 Digits Print/Display, 24 digit calculating. Black/Red Ribbon Cartridge or Spool, 5.0 lines per second IKT (Individual Keyswitch Technology Keyboard Decimal Settings +, F, 0, 1, 2, 3, 4, 6Rounding Truncate, 5/4 Roundoff, Round U