Combining a scientific calculator and a writing pad, with a stylus conveniently located behind the calculator. Calculate and take notes anytime, improving learning and work efficiency. Clear 12-digit display for easy calculation. Features 240 mathematical functions covering basic calculations, scientific functions, etc. The foldable design protects the calculator's keyboard and writing pad, making it portable and quickly accessible for immediate use. Practical for quick notes, calls, and meeting minutes. Easy to use, suitable for students, offices, and professionals. The desk calculator is powered by a replaceable CR2025 battery. Operating time: 12-18 months, standby time: 18-24 months; energy-saving and long standby time, no need to worry about low battery. The scientific calculator uses a blue matte LCD screen to protect your eyes. The writing pad is also clearly readable. Paperless and eco-friendly, with reusable writing. Dual-line display design; the top line shows the calculation process, the bottom line shows the result. Press the clear button to erase LCD notes and protect your privacy. A special one-button lock function prevents accidental deletion of important information. Color: Black Material: Plastic Package Contents: 1 x basic calculator (other items not included)