The OREVA OR-1712-C is a financial calculator designed to facilitate a range of financial computations. It features a 12-digit display, allowing for the handling of large numerical data. The calculator is equipped with both solar and battery power sources, ensuring continuous operation under various lighting conditions. A notable function is the 120-step Check & Correct feature, which enables users to review and amend up to 120 previous entries, thereby reducing errors in complex calculations. The device also includes an automatic power-down function to conserve energy when not in use. Its color-coded keyboard enhances user experience by providing clear differentiation between various function keys. These features make the OREVA OR-1712-C a reliable tool for professionals and students engaged in financial tasks.