Additional Details ------------------------------ Product description: Features. Extra Large display - Larger display makes more data easier to read.. 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.. Plastic keys - Designed and engineered for easy operation.. Durable metal Faceplate - Tough cover stands up to rough treatment.. Tax calculation - Automatic calculation of price plus tax price less tax discount selling price tax amount discount amount and margin amount.. Profit margin percent - key gives quick access to prices and profits and also delivers add-ons discounts ratios and increasedecrease values.. Function command signs - A symbol - on the display indicates the status of operation you are currently performing.. Dimension - 36.3 H 155 W 209 D mm.