. Despite its modest size, this calculator has large keys and a clear display. Can be used anywhere thanks to dual power supply. Number of characters: 8. Tax calculation: Yes. Correction key: Yes. Display: Alphanumeric. Display (Symbols/Lines): 1/8. Double zero key: No. Thousands separator: No. Memory keys: 3. Decimal place selection: No. Margin calculation: No. Percentage calculation: Yes. Currency conversion: No. Root function: Yes. Power supply: Batteries/Solar. Batteries included: Yes.