1.Compared with traditional battery calculators, our calculator is with a Type-C data cable, no need to replace batteries frequently. It can be used for about 240 days to 300 days (depending on each person's usage) with a 150-minute charge. It also has a solar panel, so you 't have to worry about running out of power when using it . It can also support continuous use for a period of time when the battery runs out. 2.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. 3.The pocket calculator, weight only 4 oz, can be folded as small size, you can put it in your pocket, briefcases or schoolbag to office, school. 4.Have you ever encountered the trouble of not being to find a pen and paper to record the results of the calculation process? This financial calculator combined with an LCD writing tablet solves that problem Great for and paperless. You can take notes during calculations, calls and meetings, thus improving your study and work efficiency. Say goodbye to tedious steps. Own it now 5.The button of basic calculator is made of premium ABS plastic material, which is more sensitive than silicone button. After repeated press will not interfere with its sensitivity. Color: White Material: ABS Package Contents: 1 x Calculator (Foldable, Rechargeable) 1 x Type-c charging cable 1 x Stylus 1 x User's Guide 1 x English manual 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.