The Casio FX-300MSPlus Scientific Calculator is a handheld device with a regular key size, making it easy to carry and use on-the-go. It is powered by batteries or solar energy, ensuring that you can always rely on it for your mathematical needs. This advanced calculator features a 10-digit display, last digit erase function, and comes with a protective case for safe storage. The Casio brand guarantees quality and accuracy in calculations, making it a reliable tool for professionals and students alike. no back on calculator