Upgraded 82MS Plus Scientific Calculator, ROATEE Professional Calculators with Erasable LCD Writing Tablet, Solar and Battery Dual Power,Desktop Calculator Notepad for Office, School

[Scientific Calculator with Writing Tablet]ROATEE calculator is equipped with a 6.5 inches LCD writing tablet,helping you take notes while calculating even without a paper [240 Functions]Our professional science calculator covers 240 functions,including basic,scientific and statistical calculations,which can complete most computing issues.Suitable for students for exam [Foldable and Portable]Pocket calculator weighs only 5.0oz.It can be folded as half size,so that you can put it in your schoolbag,briefcase easily [Solar and Battery Powered]CR2032 battery is built in the scientific calculator and it can be replaced.It can also be powered by solar energy.No need to worry about running out of power [Locked and Unlocked Position]Slide the button to the locked position to keep your notes.If you want to erase them,please change to the unlocked position,and click reset keys to erase your notes