The OREVA OR-212-C is a versatile 12-digit calculator designed for both personal and professional use. It features a 120-step Check & Correct function, allowing users to review and amend up to 120 previous calculations, thereby minimizing errors. The calculator is powered by both solar energy and a battery, ensuring uninterrupted operation under various lighting conditions. Its soft keypad enhances user comfort during prolonged use. Additionally, the OR-212-C includes an Auto Replay function, enabling automatic review of calculation steps for verification purposes. These features make it suitable for environments such as offices, conference rooms, homes, worktables, showrooms, and schools.