🔍 Master Math Like a Pro! Designed to fit in your bag, this sleek calculator is your perfect companion for meetings and lectures. Experience clarity with an advanced LCD display that makes reading results effortless. Calculate integrals and differentials with precision, ensuring accuracy in every project. With 552 functions at your fingertips, tackle any mathematical challenge with confidence. Stay powered on-the-go with a reliable battery supply, perfect for busy professionals. LCD display Battery powered 552 functions The Casio FX-991EX is a high-performance engineering/scientific calculator featuring 552 functions, battery power, and a clear LCD display, making it an essential tool for professionals and students alike.