14 digitsRegular percentRegular percentage calculations.Tax calculationAutomatic calculation of price plus tax, price less tax, discount, selling price, tax amount, discount amount, and margin amount.Two-way power (Solar + Battery)Solar powered when light is sufficient, battery powered when light is insufficient.Key rolloverKey operations are stored in a buffer, so nothing is lost even during high-speed input.Extra Large displayLarger display makes more data easier to read.Plastic keysDesigned and engineered for easy operation.Durable metal FaceplateTough cover stands up to rough treatment.