Feature:1. Writing Tablet: This pocket calculator adopts 2 in 1design which integrates scientific calculator and 6.5in writing tablet, saving your pen and paper.2. Portable Size: This pocket calculator is small in size and light in weight, you can put it in a bag, pocket or purse and use inbuilt stylus to record anytime, anywhere.3. Noiseless Button: This pocket calculator adopts silicone button, providing quiet and silent use experience, which will not bother others.4. Reusable Writing Board: Click the button to clear the writing board. When it cannot be cleared, please check the lock key. Inbuilt rechargeable battery.5. Eyesight Protection: This pocket calculator has no blue light screen, which can effectively protect your eyesight, perfect choice for work, study or office.Specification:Item Type: Calculator NotepadMaterial: ABSColor: BlackBattery Type: Inbuilt 120mah Lithium Battery (Battery Included)Single Charge Using Time: 3-6 MonthsWriting Board Life: More Than 50000Screen Input Maximum Number of Digits: 12Usage: Simple Four Operations, Record the Operation Process and Results, Can Be Calculated While RecordingScope of Application: Can Be Used in Homes, Schools, Shopping Malls, Offices and Other Places..Package List:1 xCalculator Notepad1 x Stylus1 x USB Cable1 x User Manual