Upgraded 991ES Plus Desktop Scientific Calculator,ROATEE Calculator with Writing Tablet,Multiview 4 Line Display Erasable LCD Tablet,Solar Battery Power Notepad for School

[991ES Multifunctional Scientific Calculator] - ROATEE business calculator features 417 computing functions, which is more than the common scientific calculator on the market. And this can meet almost all of your daily computing needs. [Scientific Calculator with Notepad] - This scientific calculator for students intergrates calculation and notebook with a stylus pen. The lcd writing tablet enables you to take notes during the calculation, which do great help for study and work. Great portable high school supplies! [NOTE]Only Unlock the LOCK KEY will the writing area and the erase button work. [Dual Power Solar Panel & Coin Battery] - The replaceble coin battery is built in this scientific calculator. It is also powered by solar energy so you don't need to worry about battery depletion. [Anti-Drop Body with High Durability] - The body of this scientific calculator undergoes rigorous quality tests. Due to the design of anti-drop body, no need to worry about the damage by accidentally falling. [Lightweight and Portable Design] - This lightweight scientific calculator only weighs 5 ounces.It can be easily put in your pocket, which is convenient for business and college. [Conversion of Fraction and Decimal] - You can change the results through the key 'S⇔D'; Or you can configure calculator setting: 1. Press the button 'SHIFT'. 2. Press the button 'MODE'. 3. Choose 1 or 2 to set the mode of fraction or decimal. (MthIO for fraction, LineIO for decima)