♡The protective case is hard and can prevent damage to the calculator. It is sturdy and professional grade scientific calculator. ♡12 Digits widescreen display, 2-line display, displaying both time input and calculation results. ♡Professional level scientific calculator with 240 scientific functions. Easily handle statistical calculations for variables 1 and 2, as well as three angles (degrees, radians, and divisions) and scientific/engineering symbols. ♡Powered by batteries, reliable to use. ♡The sliding protective case is hard and can prevent scratches, collision, and dust. Very suitable for high school students, college students, and professionals.