- DOUBLE POWERED: Enjoy uninterrupted usage with our scientific calculator, featuring a built-in replaceable button cell battery and solar power capability. No more worries about battery depletion. - SCIENTIFIC CALCULATOR WITH NOTEPAD: This innovative combination of a calculator and writing board allows you to calculate and take notes seamlessly. The included touch pen is conveniently attached, and with the erase button, you can quickly clear the screen to start fresh whenever needed. - PORTABLE DESIGN: The compact and lightweight design makes it easy to carry to school, work, or anywhere math calculations are necessary. Constructed from shatter-proof plastic, it ensures durability while providing a comfortable grip. The responsive buttons and clear display enhance usability. - COMPREHENSIVE FUNCTIONALITY: Equipped with 417 functions, this calculator supports a wide range of mathematical operations, including basic arithmetic, square roots, powers, trigonometric, and statistical functions. The memory function can store over five data points, minimizing the risk of errors during calculations. Use Scenarios: 1. Ideal for students needing quick calculations during exams or while studying. 2. Perfect for professionals who require efficient note-taking and calculations during meetings. 3. Great for engineers or scientists conducting fieldwork that demands portable, reliable math tools.