[Multifunctional Calculator]: This basic calculator integrates calculation and notebook with stylus. No paper required, you can take notes while calculating, thus improving learning and productivity, saving time and making it more convenient. [6-Inch LCD Screen]: The calculator with notepad features an upgraded LCD screen with green highlight writing. Built-in CR2025 battery, one-key lock and one-key erase function. You can change the thickness of your handwriting based on the pressure you apply to the screen. Record calculation results at any time to achieve ultra-efficient work. Suitable for business accounting, home, school. [Dual Power Supply Design]: Laptop calculator utilizes solar energy and batteries (AA batteries included). This calculator has a built-in replaceable battery. Solar powered, no need to worry about running out of batteries. [Portable and Convenient]: This calculator tablet can be carried with you and taken out for use immediately when needed. [Ergonomic Design]: The keys of the calculator with writing pad are designed in keyboard mode based on ergonomic principles. The keys are of moderate size and sensitivity, and are not easy to wear; place the notepad calculator on the desktop, with the calculator screen at 30to the flat , facing of sight, and clearer than a horizontal monitor. It will not cause cervical spine fatigue even if used for a long time, making it easier to work. higher efficiency. Colour:Black Material:Plastic Package Contents: 1set * calculator with notepad Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.