Performance and Operation: Works with high efficiency and without any problems or response failures. Cleanliness and Condition: In excellent condition and free from cracks or significant scratches. Target Use: Ideal for middle and high school students, and university students (Engineering, Business Administration, Science, and Statistics majors). Design: Lightweight and comfortable in hand with a protective sliding cover. Condition: Very clean and works 100% excellently, includes all mathematical, engineering, and statistical functions and calculations.