1、Multifunctional Scientific Calculator: The office calculator surpasses ordinary scientific calculators with its 417 computing functions and 8 kinds of calculating, catering to a wide range of your daily calculation needs. 2、Integrated Calculator and Notepad: This student friendly scientific calculator combines calculation and note taking with a stylus pen. The LCD writing tablet allows you to jot down notes during calculations, significantly aiding your study and work. It's an excellent portable tool for high school students. 3、Solar Panel and Coin Battery Dual Power: This scientific calculator is equipped with a replaceable coin battery and also powered by solar energy, eliminating concerns about battery depletion. 4、High Durability Anti Drop Body: The body of this scientific calculator has undergone rigorous quality tests. Its anti drop design ensures durability, so there's no need to worry about accidental falls causing damage. 5、Portable and Lightweight Design: Weighing only 5.3oz, this scientific calculator is lightweight and easily fits in your pocket, making it a convenient tool for business and college use. Model: 991ES Product Size: Unfolded - 162x162x17.5mm Product Weight: 153g/5.3oz Battery: CR2032 3V 240mAh Product Main Material: ABS Input pressure: 150-300g Display panel: LCD flexible screen + calculator Reflectivity: 25%-30% 1 x Science Calculator