Graphing Calculators with Detachable Notepad: This graphing calculator combines calculation with an LCD writing tablet and stylus for taking notes and working out problems. The writing tablet charges independently and can be installed on either side for flexible use. It is also detachable, making it easy to remove and carry separately for exam use. 👉NOTE: Unlock the LOCK key to use the writing area and erase button Suit for Comprehensive Use: ROATEE graphing calculator integrates essential calculations with advanced mathematical tools, including Complex, Base, Matrix, Vector, Table, Statistics, Equation, Graphing, and Function Solving. Designed for everything from everyday calculations to advanced mathematical analysis, suit for high school and college students Eco-Friendly Design: Both the calculator and writing tablet feature independent Type-C rechargeable power, reducing disposable battery waste and easing concerns about battery life. Charge each module separately and use only the power you need for a more efficient, eco-conscious experience Design for Convenient Use: Features a large screen supporting up to 100-character input and 200-byte history records, with full-screen graph display and adjustable screen contrast for clear viewing. Stores up to 8 variables and offers 5 auto-off settings (5/10/15/30/60 mins) for convenient, efficient use What’s Included: Graphing Calculator ×1, LCD Notepad ×1, Stylus ×1, Type-C Charging Cable ×1,Box ×1