This basic calculator for people integrated calculation and notebook with a stylus pen.With no paper required, you can take notes while calculating, thus improving your learning and productivity, saving time and making it more convenient. The calculator with notepad adopts an upgraded LCD screen, and has green highlighted writing. Built-in CR2025 battery, with one-key lock and one-key erase functions. You can change the thickness of your handwriting according to the amount of pressure you apply to the screen. Record calculation results at any time to achieve ultra-efficient work. For business accounting, home, school. The notebook calculator utilizes both solar energy and battery power (AA batteries included).The replaceable battery is built in this calculator. It is also powered by solar energy so you don't need to worry about battery depletion. This calculator handwriting pad can be carried around and taken out for immediate use when needed. The keys of the calculator with writing pad are designed in keyboard mode according to the principle of ergonomics. The keys are moderate in size and sensitive, and are not easy to wear; when you put the notepad calculator on the desktop, the calculator screen and the plane present 30, facing your line of sight, clearer than a horizontal display, even if used for a long time, it will not cause cervical fatigue, and the work efficiency is higher. Colour:Black Material:ABS Package Contents: 1 set x calculator with notepad 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.