Extensive Calculation Functions: Expand your computing power with this calculator's 417 functions; no problem is too complex for this scientific tool. A calculator with this many functions can help users solve almost any mathematical equation, broadening its academic or professional applications. Dual Power: This calculator with notepad uses no power, utilizing both replaceable button cell batteries and solar power. This ensures functionality in any situation; dual power supply system versatility prevents calculation interruptions, avoiding data loss and saving time. Compact and Portable: With desktop dimensions of approximately 16 x 8 x 1.8 cm, it's designed to easily fit in your hand, a small bag, or desk drawer. Its compact size ensures that whether you're a researcher, student, or anyone who frequently performs complex calculations, it can go with you. Efficient and Clear Display: Benefit from the clarity and efficiency provided by the LCD writing pad; large enough to clearly display data yet compact for simplicity, the LCD ensures your calculations, formulas, and results are easy to read and understand for maximum productivity; you can press the transparent button to erase LCD notes. Perfect Choice: This black scientific calculator is a must-have for students, math teachers, and more; with 417 calculation functions, it's perfect for solving your needs, studies, and office work. This smart calculator is practical and portable, easily stored in pockets and briefcases for convenient use. The school scientific calculator features an erasable LCD writing pad that clearly displays data, providing a great user experience. Type: 417 Functions Color: Black Material: ABS Size: Approximately 16 x 8 x 1.8 cm Package Contents: 1 * Solar-Powered Scientific Calculator Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3 cm.