The Citizen CT-500V Check & Correct 2-Power 10-Digit Calculator is a large desktop calculator with large keys and a large display, ideal for office use. It features a 32-step replay function, making it a reliable tool for accurate calculations. This calculator is powered by both solar and battery sources, ensuring uninterrupted operation. Made by the reputable brand Citizen in China, this model is designed for efficient and precise computing in a business or office environment.