The Sharp EL344RB 10-Digit Calculator with Punctuation provides you quick and simple calculations without those extra confusing features. This twin-powered calculator also features a metric converter with 44 built-in conversions. The extra large 10-digit fraction display and colored conversion keys make the EL344RB easily operable. It performs all the basic functions - addition, subtraction, multiplication and division and also includes square root, sign change, and percent keys. This small but powerful calculator has a 3-key memory and will automatically turn off if left on unused.