The OREVA OR-1812-C is a financial calculator designed for practical and comfortable everyday use. It features a large, easy-to-read 12-digit display and a soft keypad for efficient data entry. The calculator supports up to 120 steps of check and correct functionality, allowing users to review and amend their calculations as needed. It also includes an auto replay function for automatic review of calculation steps. The device is powered by both solar energy and a battery, ensuring uninterrupted operation in various lighting conditions. Additionally, it offers a “000” function key for quick input of large numbers. The OR-1812-C is suitable for use in offices, conference rooms, homes, worktables, showrooms, and schools.