Currency conversion (1 rate) Pro-percentage Mark up with percentage key Backspace key Sign change (+/-) Key rollover Large buttons and an easy-to-read display: these professionally designed calculators ensure correct results in the office. These models stand out thanks to a variety of functions and a sophisticated style. Design Ergonomic design Yes Control type Buttons Cover No Housing material Aluminium Product colour Blue Type Financial Form factor Pocket Performance Currency converter Yes Display Display size (HxV) 79 x 23 mm Display tilting No Display type LCD Digits 8 digits Power Auto power off Yes Battery type LR54 Power source Battery/Solar Weight & dimensions Weight 120 g Height 28 mm Depth 149 mm Width 101 mm manual pdf