The Canon WS-1400H calculator has a wide range of features that solve your calculation problems quickly. With a 14-digit capacity, large calculations such as currency exchanges can be easily accommodated. In addition, the WS-1400H has a convenient key roll-over system for quick entry. The large, durable plastic keytops with double-zero and triple-zero keys ensure accurate operation. Add to this the dual power capability - both solar and battery - and you"ll see why the choice is clearly Canon.