991EX Scientific Calculator: ROATEE business and school scientific calculator have 552 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 6 calculations at the same time on screen, greatly improves computational efficiency Dual Power Solar Panel & Rechargeable: The rechargeable battery is built in this scientific calculator, reduces battery replacement frequency, eco-friendly. It is also powered by solar energy so you don't need to worry about battery depletion Anti-Drop Body and Portable: The body of this scientific calculator is constructed using ultrasonic bonding technology, resulting in an almost seamless integration of the casing. It has also undergone rigorous quality testing to ensure its reliability and performance. 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 Conversion of Fraction and Decimal: You can change the results through the key 'CHG'; Or you can configure calculator setting: 1. Press the button 'SHIFT'. 2. Press the button Function'. 3. Choose 1 and set the mode of fraction or decimal. 【MthIO for fraction, LineIO for decimal】 What Will You Get?: 991EX scientific calculator*1,usb-c charging cable*1,instructions*1,exquisite packing box*1

• Dual Power Solar Panel & Rechargeable: The rechargeable battery is built in this scientific calculator, reduces battery replacement frequency, eco-friendly. It is also powered by solar energy so you don't need to worry about battery depletion
• Anti-Drop Body and Portable: The body of this scientific calculator is constructed using ultrasonic bonding technology, resulting in an almost seamless integration of the casing. It has also undergone rigorous quality testing to ensure its reliability and performance. 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
• Conversion of Fraction and Decimal: You can change the results through the key 'CHG'; Or you can configure calculator setting: 1. Press the button 'SHIFT'. 2. Press the button Function'. 3. Choose 1 and set the mode of fraction or decimal. 【MthIO for fraction, LineIO for decimal】
• What Will You Get?: 991EX scientific calculator*1,usb-c charging cable*1,instructions*1,exquisite packing box*1

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