Who needs calculators nowadays when Microsoft excel is readily available at your fingertips? I always do. A calculator would go handy in your pocket wherever you go and whenever you need it especially at business meetings outdoors. This 12-digit office equipment, 5 x 5 in dimension, with a two-way power and automatic power-off loaded with one l.5 volts battery is my permanent companion and problem solver if computers bug down and occasional brownouts happen in the office. The digits in this Casio model are neither small nor too big, just comfortable for your eyesight to give fast and accurate computations. If i decide to buy a new one, Casio would still be my best choice.