14 digits Tax calculation Automatic 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 rollover Key operations are stored in a buffer, so nothing is lost even during high-speed input. Extra Large display Larger display makes more data easier to read. Plastic keys Designed and engineered for easy operation. Profit margin percent� % � key gives quick access to prices and profits, and also delivers add-ons, discounts, ratios and increase/decrease values. 150 steps check Displays up to 150 previous calculation steps. Localized number display Displays numbers in four digit separator formats(Type A, Type B, Type C and Indian). Durable metal Faceplate Tough cover stands up to rough treatment. Super command signs Big, easy-to-read command signs show your current operation at a glance.