1. Equipped with 6 Inch writing tablet, you can take notes or graph while calculating by using the stylus pen in the bottom left side. 2. Solar and Battery Dual Powered: calculator with writing tablet is powered by a button battery CR2025 (already installed on the device); With dual power, you can use the calculator daily for about a year. Tips: The solar panel only powers the calculator, not the drawing board. 3. One-touch Instant Clear and Locked Function: This office calculator has a reusable writing board, which is convenient to use, you can click the button to clear the writing board and protect personal privacy; and the lock function can avoid accidentally delete; make a record anywhere with the built-in stylus, this calculator notepad is a perfect choice for work, study or office. 4. Portable small calculator: The portable small calculator is about the size of your phone, you can put this small calculator in your bag, the pocket can be quickly removed and used immediately when needed. The pocket calculator is perfect for work, business, engineering Calculations, accounting calculations, student calculations, home use, etc. The basic calculator is an perfect choice for leaving. 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. Colour:Black Material:ABS Package Contents: 1 * Calculator (Foldable, Rechargeable) 1 * Stylus 1 * Chinese and English instruction 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.