The OREVA OR-2312-C is a versatile calculator designed for both basic and advanced calculations. It features a 12-digit large display, making it suitable for handling extensive numerical data. The calculator offers a 120-step check and correct function, allowing users to review and amend their calculations to ensure accuracy. Additionally, it includes an auto-replay feature for easy verification of entered data. The OR-2312-C operates on both solar power and a replaceable pencil cell battery, ensuring continuous functionality under various lighting conditions. Its durable aluminum faceplate enhances longevity, making it a reliable tool for daily use.