Welcome to our store. Here is a scientific calculator, designed with a notepad, which enables you to take notes while calculating, improving study and work efficiency. A hidden stylus not easy to lose. A slide lock botton is designed on the bottom of the calculator to prevent deletion or unlock. Suitable for work business, engineering calculation, accounting calculation, student physics calculation, home use, etc. Features: 1. Designed with a notepad, which enables you to take notes while calculating, improving study and work efficiency. A hidden stylus not easy to lose, you can calculate and record at any time. Desktop calculator supports calculations with up to 10-digits, the data is clear and easy to read, suitable for the advanced and beginners. 2. An ergonomic magnetic stylus on the bottom side of the flip place, which allows you to write or draw bright and clear lines. Just press the erase button once after use. 3. Silicone material key more sensitive and more precise. Comfortable to touch. A slide lock botton is designed on the bottom of the calculator to prevent deletion or unlock. 4. Made of and ABS, sturdy and durable, you can easily write while calculating. The screen of the tablet is a flexible LCD handwriting film panel, enables smooth picture. Powered by 1pcs battery, no need to recharge, it can be used for about one year. 5. Can be taked in pockets, wallet, school bags, desks, offices. Suitable for work business, engineering calculation, calculation, student physics calculation, home use, etc. Specification: Material: ABS+Silicone Battery voltage: 3V Battery capacity: 170mAh Stylus pen length: 10.3cm/4.1in Handwriting board area: 13.5 * 7.2cm/5.3 * 2.8in Weight: 131g/4.6oz What you get: 1 * Scientific Calculator 1 * Manual 1 * Stylus Pen Welcome to our store, may you have a pleasant shopping experience! If you have any problems about our products, please feel free to contact us at any time!