Larger display makes more data easier to read. Solar powered when light is sufficient, battery powered when light is insufficient. Key operations are stored in a buffer, so nothing is lost even during high-speed input. Designed and engineered for easy operation. Tax calculation and currency conversion functions. % key gives quick access to prices and profits, and also delivers add-ons, discounts, ratios and increase/decrease values. A symbol (+, -, x, ÷) on the display indicates the status of operation you are currently performing.