【All-in-One STEM Calculator】: Master algebra, calculus, and statistics with 240 scientific functions. Take notes directly on the built-in LCD writing tablet, eliminating scratch paper during school math homework, physics labs, and college exam prep. 【Dual-Line High-Contrast Display】: View equation inputs and results simultaneously on a clear dual-line screen. High-contrast display reduces data entry errors, speeding up multi-step calculations for high school, college students, and math teachers. 【Anti-Deletion Lock & Hidden Stylus】: Lock formulas during SAT, ACT, or AP exams to stop accidental erasures. The pull-out stylus stores securely inside the body, preventing lost pens and eliminating messy eraser marks on your desk or backpack. 【Reusable Paperless Writing Board】: Replaces scratch paper with a pressure-sensitive LCD screen tested for 100,000 writes. Ideal for students asking for an exam-ready scientific calculator with notepad to draft equations and solve physics problems. 【Reliable Quality & Warranty】: Includes DPEDUAI 240 function scientific calculator, built-in LCD notepad, stylus, and battery. Fully complies with safety standards, backed by a 14-month warranty and responsive Amazon support for total confidence. Finally—a Scientific Calculator That Lets You Write, Solve, and Erase All in One Place Built for the demands of modern STEM education, this calculator combines 240 advanced functions with a reusable LCD writing tablet—so you can derive equations, sketch graphs, and check work without paper clutter. The anti-deletion lock ensures your critical steps stay visible during timed exams (approved for most standardized tests*), while the one-click clear button resets your workspace instantly. Whether you’re a high school student tackling trigonometry, a college engineer running simulations, or a finance pro double-checking numbers, this tool keeps you focused, fast, and paper-free. *Always confirm with your exam board’s calculator policy.