Ergonomic Design: silicone buttons provide comfortable feedbacks for effortless data entry The responsive keys and foldable design a seamless user for extended use Double Power Supply: Features solar energy and button battery operations for good Never worry about power interruptions during important calculations or meetings with this sustainable energy solution Clear Display: Equipped with 10 digit LCD screen and 65mm viewing width for excellent visibility Large display area ensures comfortable reading of calculations and smooth handwriting Compact & Portable: Folds to just 160x78mm (6.3X3.1 Inches) and weighs only 120g, making it easy to carry in bags or pockets Perfect travel companion for business trips, classrooms, or outdoor use Multi Function Tool: Combines scientific calculator and writing pad functions for versatile computing needs, enhancing work efficiency with Double purpose convenience Ideal for students and professional requiring both calculation and note taking capabilities, Manufacturer: JSGHGDF