[240 Functions] - Professional grade scientific calculator with 240 scientific functions. Includes percentages, trigonometry, summation, fractions, regressions, and permutations/combinatorics. [Robust Design] - Features a sliding cover and is constructed with durable, fracture-resistant plastic for long-term use. Responsive buttons designed to withstand millions of inputs. 2-Line Display Engineering Scientific Calculator: Equipped with a 12-digit widescreen HD display. The dual-line screen allows inputs and results to be viewed simultaneously, simplifying calculations and reducing errors. Ideal for education, office use, and home. Powerful Function Mathematical Scientific Calculator: Suitable for secondary and university-level coursework, including algebra I/II, geometry, and physics. Supports daily learning and academic success.