Portable Type, 10 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., Function command signs: A symbol (+, -, ×, ÷) on the display indicates the status of operation you are currently performing. 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: " percent " key gives quick access to prices and profits and also delivers add-ons, discounts, ratios and increase/decrease values. Durable metal Faceplate: Tough cover stands up to rough treatment. Dimensions (D × W × H) : 120×71×8.7mm, weight : 55g.