Scientific Calculator with LCD Notepad 417 Functions Professional Portable Foldable Calculator for Students Upgraded 991ES Black

1. Innovative 2-in-1 design combines a scientific calculator and LCD notepad. Built-in stylus allows you to take notes while calculating., 2. Features 417 powerful functions including statistics, integrals, derivatives and complex number calculations. Suitable for students and professionals., 3. Foldable cover can be closed to protect the LCD screen and keys. Fits in your pocket for portability and convenience., 4. Powered by solar panel and a replaceable CR2032 battery for sustainable use., 5. High-quality plastic keys are precise and responsive compared to silicone keys., 6. Large LCD display shows calculations and notes clearly. Notes can be deleted or locked to save., 7. Slim, lightweight and ergonomic design perfect for on-the-go use., 8. 2-line display allows two operations to be entered and viewed at once., 9. Easy to use but with advanced functions for complex calculations. Great for both students and engineers., 10. Ideal gadget for school, office and field work. A must-have tool for studies and research.