[Pocket size calculator with writing tablet & pen ]- Our desk calculator solar powered installs the writing board in the below position and the pen is hidden in the upper right corner, which can hide on the mini calculator, so you can write what you want on the notepad quickly with less hand movement, improving productivity and efficiency. You can calculate and record very easily. [12-Digits & dual power basic calculator school]- This pocket calculator black supports calculations with up to 12-digits, the data is clear and easy to read, suitable for advanced and beginners. Handheld mini calculator have solar energy and battery backup power keep the desktop calculator 12 digit working in low light conditions, durable and long standby. [Silicone buttons]- The electronic desktop calculator adopts a silicone button design, which conforms to human habits and is comfortable to touch. [Portable to carry]- This handwriting calculators notepad is only 108g, lightweight and clamshell hidden wordpad design, easy to carry. You can take the mini calculator in your bag, pocket and purse as a notebook or financial calculator, perfect for office, nurses, kids, and home use. [Eco-friendly]- With this 3-in1 Basic Calculator small, you can calculate and record at any time, you also can put it as a notepad when you are not using the calculator. The mini calculator for nurses and kids has a button, you can click this erase button to clear the full screen, write repeatedly without ink and dust, reducing paper consumption and being eco-friendly. Colour: black Product Includes: 1pc Size: 120*95*15 mm