Calculator with Notepad: Equipped with 6.5 Inch writing tablet, you can take notes or graph while calculating by using the stylus pen in the bottom left side. You can keep your notes through turning the button into the locked position. And if you want to erase the notes, please turn it into the unlocked position and click the delete button to erase them. & Portable:can be folded as small size, you can put it in your pocket, or schoolbag to school. Convenient to use and easy to carry. As you enter the numbers you can see them as they are added or subtracted or whatever function you are using. More Sensitive Key: The button of basic calculator is made of premium ABS plastic material, which is more sensitive than silicone button. After repeated not interfere with its sensitivity. More efficient. Rechargeable & Solar Power: Our portable calculator can be powered by solar panel / lamp and Type-C charging cable. A single charge last more than 3 months. Suitable for School & Office: Ideal for primary and middle school students. Also great for office use and home use. It has memory keys. You it once to recall memory and twice to clear memory. Color: Black Material: ABS Package Contents: 1 x Calculator 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.