2 IN 1 FUNCTION : This calculator notepad is a combination of a standard calculator and writing board. With the stylus pen magnetically attached to its side, you can calculate and record at any time. RECHARGEABLE: Compared with traditional calculator, our product applies Type-C cable to power itself instead of one-time button battery. It only takes 1.5 hours to be fully charged. Great choice for eco-friendly lifestyle NO KEYPAD TONE : The keyboard of the calculator is silicon-made, which gives you much more comfortable touch feeling and a silent using experience. PORTABLE: This lightweight calculator is clamshell, with this feature, the keyboard can be well protected. And its portable size will allow you to take it out anywhere. Colour: black Product includes: 1pc Size: 6.5 inch Notes: Please allow 1-3cm error, due to manual measurement, please make sure you dont mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual colour of the item. Thank you for your support