“Portable Type 6.9(H) × 57(W) × 102(D) mm Large display: Large, easy-to-read display. 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 & exchange function: Tax calculation and currency conversion functions. Profit margin percent: “” % “” key gives quick access to prices and profits, and also delivers add-ons, discounts, ratios and increase/decrease values. Function command signs: A symbol (+, -, ×, ÷) on the display indicates the status of operation you are currently performing.