The calculator, notepad and pen are designed together.It can improve your learning and work efficiency, is simple to operate,suitable for beginners and science builders,very portable high school supplies. This small calculator also provides 240 functions including statistical counting, trigonometric functions, and square root calculation, etc. Elevate Your Power Experience with Dual Source design! This advanced scientific calculator features a built-in replaceable coin battery, ensuring worry-free operation. Harness the power of the sun with its solar energy capability, eliminating concerns about battery depletion. This versatile calculator doubles as a stylish notepad when not in use. Enjoy the freedom to write and erase repeatedly, cutting down on paper usage for an eco-friendly, dust-free, and ink-free experience. Embrace the of sustainable living! 10-digit LCD, 2 replaceable button batteries - no screws needed! Never fret about battery depletion again. This handwritten calculator is light in weight and easy to carry. You can put it in your bag, pocket, or even wallet. It is a perfect choice for office calculations, construction calculations, financial. 1 x calculator notepadIt is the best gift for kids, teens, middle, high, college students, teachers, and friends. Colour:Black Material:ABS Package Contents: 1 * 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.