Casio Calculators – DX-12B

12 Digits. Regular percentage (%). Two-way Power (Battery + Solar). Solar powered when light is sufficient, battery powered when light is insufficient. Extra large display for easier reading. Durable plastic keys for ease of use. Key rollover: Key operations are stored in a buffer, so nothing is lost even during high-speed input. All the mark-up capabilities of an adding machine for simplified cost and profit calculations.