The OREVA OR-512GT is a versatile calculator designed to meet the needs of both professionals and students. It features a 12-digit display, making it suitable for a wide range of calculations. The calculator offers a 120-step check function, allowing users to review and correct their entries, thereby minimizing errors. For added convenience, it includes an auto-replay function, enabling users to revisit previous calculations effortlessly. The OR-512GT is equipped with both solar and battery power sources, ensuring uninterrupted usage under various lighting conditions. Its soft keypad enhances user comfort during prolonged use. Additionally, the calculator comes with a hard cover, providing extra protection and durability, making it ideal for use in offices, conference rooms, homes, showrooms, and schools.