Features: 1. It is a professional scientific calculator that can use the statistics editor for counting and fraction calculations. 2. The scientific calculator can also perform basic mathematical operations, including trigonometry, roots, nth roots, percentages, fractions, complex numbers, permutations, linear regression, standard deviation, and variable solving 3. The two-line LCD display is clearer and easier to read, allowing you to view calculation formulas and results at the same time. (When using equations, the large 12-digit display can display equations at the same time so that you can view calculations and corrections in detail.) 4. The scientific calculator is suitable for middle school students, easy to handle 1 and 2 variable statistical calculations and three angle modes (degrees, radians and gradients) suitable for advanced and elementary courses, including algebra, geometry, trigonometry, calculus, etc. 5. Sensitive keys use high-quality inductive buttons, which can quickly respond to input characters. 6. Ergonomically designed hard slide cover protects the calculator and provides a comfortable grip, protecting it from breakage. 7. The calculator is equipped with LR44 battery for power supply, which can guarantee power supply even in low light conditions. Compared with other common calculators on the market, it has a longer service life, supporting the calculator to work longer. Product Specifications: 1. Material: ABS, electronic components 2. Dual power supply: Solar 1 x LR44 button battery (shipping with battery) 3. Functions: 240 4. Product size: 16.5 x 8.4 x 1.17 cm 5. Weight: 150 grams 6. Note: It is recommended to install batteries to avoid insufficient light, resulting in incomplete display Packing list: -Calculator x 1 -Instruction manual x 1