Casio Graph 85SD graphing calculator 4971850171485 Graph 85SD graphing calculator Connectable, scalable, giant screen, innovative: 2D display and writing for better understanding, spreadsheet, E-Activity junior. Has an SD card slot (SD card not included), which increases the memory capacity of the calculator. High-Tech Design. 1.5MB Flash memory. PC connection via a USB port (connection kit supplied). GRAPH connection via SBG2 cable (supplied). Dedicated to high school all sections and higher studies. Power supply: 4 x A