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

991ES Multifunctional Scientific Calculator: ROATEE business calculator features 417 functions, deal For: General math and science, Pre-Algebra, Algebra 1 and 2, Geometry, Statistics and regressioncal culations, Calculus, fractions, decimals, Calculations involving specificnumber systems (BASE-N, binary,octal, decimal,hexadecimal), Complex number calculations, EQN, Matrix calculations, TABLE, VECTOR, SOLVE, Biology, Chemistry so on and it has memory function calculation more user-friendly, Scientific Calculator with Notepad: This scientific calculator for school and business 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. 👉NOTE!Only Unlock the LOCK KEY will the writing area and the erase button work, Multiview: display shows 4 calculations at the same time on screen, greatly improves computational efficiency, 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 and Portable: 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 and it has only weighs 5 ounces can be easily put in your pocket, which is convenient for business and school, What Will You Get?: 991ES scientific calculator*1,instructions*1,exquisite packing box*1,packing case*1.