The Casio FX-115ES PLUS is a reliable and efficient scientific calculator suitable for business, office, and personal use. This calculator features a regular-sized key, a regular-sized display, and is powered by both solar and battery sources. It is handheld, making it easy to carry around. The Casio FX-115ES PLUS is a top-quality calculator that provides accurate and fast results for all your scientific calculations. It is also a perfect choice for students, professionals, and anyone who needs a reliable calculator.