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

ROATEE Scientific Calculators, Desktop Calculator for Office, Back to School Supplies [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.