about this project 2-in-1 Scientific Calculator- This scientific calculator is combined with an LCD writing tablet. With the stylus behind the tablet, you can calculate and record on the go. One-click clear button on the writing panel, clear the full screen, and use it repeatedly without wasting paper. Designed with a lock screen function to prevent accidental erasure of any information on the writing notepad. Solar and Battery Dual Power Supply-Solar and battery dual power supply to power the calculator, it can be fully charged in any well-lit environment without worrying about the battery being dead. Our calculator screen has a 10-digit display with clear fonts, so there is no problem calculating multi-digit numbers. So adding a small solar panel to a calculator is more convenient and more environmentally friendly than a calculator that only uses batteries. Durable and Smooth- LCD writing tablet, you can write easily while calculating. The flat panel screen is a flexible liquid crystal panel, the picture is smooth, there is no friction noise when writing, and it will not disturb others. The font is clear and the writing is smooth. The material of this basic calculator is LCD and ABS, sturdy and durable for long-term use. Portable & Foldable- Our scientific calculator is as small as a mobile phone, with a compact and foldable design. Therefore, you can use the calculator very conveniently and easily. This folding calculator can be placed in various places such as pockets, purses, school bags, desks, offices, etc. It does not take up much space and can be well placed. Multiple Uses- Whether you are studying or working, this calculator can meet your daily needs. And compared with traditional calculators, it is also equipped with a writing pad and a pen, which can record data at any time and provide the greatest help for your daily study. The smart calculator is convenient and practical, and it is also a good choice for gifts, especially for teenagers, teachers, and classmates.