Large 12 digit LCD display, dual power, Advanced Percentage Calculation, Currency Conversion with 3 storable rates, Mark-Up Calculation via % key, Square Root Calculation, Summarizing 4-key Memory, 00 double zero key, GT Grand Total Sum Memory. CASIO DE-12E-WE (LARGE SIZE) , High-Quality Ergonomic 12-Digit Desk Calculator Ergonomically designed Calculator for right hand users. The keypad is configured in an innovative staircase design, with 3 inclination from right to left side. Compared to conventional desk calculators, this causes less underarm torsion and hand wrist rotation, as it adapts to natural finger/hand posture. The staircase key shape enables perfect vertical keystrokes and thus eases the key typing, lessens burden and helps avoiding Repetitive Strain Injuries. The staircase design keypad causes less strain of the pronator teres muscle, the extensor carpi radialis muscle and the flexor carpi radialis muscle. The keys are extra easy to operate, and the key caps are ergono