XIANQI 2 in 1 CalculatorThe scientific calculators and notepad are designed in one, you can take notes while calculating, improving study and work efficiency. There is a stylus on the back of the writing board, which is not easy to lose, and can calculate and record at any time. This desktop calculator supports calculations with up to 10-digits, the data is clear and easy to read, suitable advanced and beginners. Repeatable writingEquipped with an ergonomic magnetic stylus on the back, allowing you to write/draw bright and clear lines. After use, press the erase button once to effectively reuse, reduce paper consumption, and achieve the goal of environmental protection. Eco-friendly and HealthyWith this 2-in1 Scientific Calculator, you can calculate and record at any time, you also can put it as a notepad when you are not using the calculator. The calculator has an erase button, you can click this erase button to clear the full screen, write repeatedly, reducing paper consumption and being eco-friendly. Both the screen of our electronic handwriting calculator and writing tablet use LCD, does not have blue light and will not hurt the eyes. Silent designOur calculator with a writing tablet is made of high-quality silicone keys, which are quiet and soft, without touch sound, and will not disturb anyone. It is suited for offices, classrooms, etc. offices, classrooms, etc. Built-in 2 button batteries, 1PCS LR1120 calculator battery, 1PCS CR1220 LCD writing board battery, no need to recharge, it can be used for about one year. (If the battery is dead, you can replace the battery by yourself) Portable to CarryThe scientific function calculator is designed as a foldable clamshell style. When not in use, you can directly cover the lid of our engineering calculator and put it in your pocket, which is convenient to carry anywhere. It is very suitable for work business, engineering calculation, accounting calculation, student physics calculation, home use, etc. Colour: black Product includes: 1pc Size: 160*77*11mm Notes Please allow 1-3cm error, due to manual measurement, please ensure you don't 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!