2 in 1 Scientific Calculator- This scientific calculator is combine with LCD writing board. With the stylus pen behind of the writing board, you can calculate and record at any time. With one-click clear button fo the panel for writing, you can clear the full screen and use it repeatedly without wasting papers. Designed with a lock screen feature to prevent accidental erasure of any information on the writing notepad. Solar and Battery Dual Power- Solar and battery dual power supply calculator that can be fully powered in any well-light environment without worrying about running out of battery. Our calculator's screen has a 10-digit display and font is clear so calculating multiple digits is no problem. So compared with calculators that only use batteries, adding a small solar panel to the calculator is more convenient and more environmentally friendly. Durable & Smoothly- LCD writing pad, you can easily write while calculating. The screen of the tablet is a flexible LCD panel, the picture is smooth and there is no rubbing noise when you are writing, it will not disturb others, and the font is clear so you can have a good writing. The material of this basic calculator is LCD and ABS, it's sturdy and durable, you can use it for a long time. Portable & Foldable- Our scientific calculator is small as a cellphone, compact design and foldable. Therefore, you can use the calculator very conveniently and easy to carry. This folding calculator can be taked in various places, such as pockets, wallet, school bags, desks, offices, etc., it will not take up much space and can be put well. Use on Multiple Occasions- Whether you are studying or working, this calculator can satisfy your daily needs. And compared with the traditional calculator, it also comes with a writing pad and pen to record data at any time, which can provide the greatest help for your daily study. The smart calculator is also a good choice for a gift because of convenient and practical, especially for teens, teachers, classmates.