This Sci-Plus Series 2300 is an easy to use fully portable talking large display calculator set in oversized color coded positively activated keys. Talking function (can be turned off if not wanted). The Sci-Plus series 2300 are the only scientific calculators designed specifically for users with low vision. The SciPlus-2300 performs scientific statistical and trigonometric calculations and fractions. It also has adds the ability to evaluate functions and includes a speech output via earbuds (included). Enlarged highly visible keypad. Large four-line graphical display with selectable contrast. Adjustable display backlight for operating in low-light conditions. Includes long life battery USB charger for battery earbuds and large print user manual. Color: Gray. Ideal for those with Low Vision or Blindness.